Removing scratches from a dome port

[timoma 0]

Speaking of which, i noticed a relatively shallow but inch long scratch on my 8inch port on the interior last week.

 

Im gathering this is going to be very difficult to remove and wondered if i should use the above procedue, or does anyone have any other tips?

 

Ive heard of things like Wet sandpaper and toothpaste working but havent found anything useful yet.

 

Cheers

Evan

 

I actually polished the inside of my 174mm dome last wekend. I basically used the micromesh pads wrapped over a piece of folded lens cloth to give a bit of padding around my fingers. As I only had minor scratches on the inside, I started from #6000 grid and worked from there. Not at all that hard to do.

 

I still need to do the outside as well, but so far the result is looking just fine.

 

timo

[MIKE POWELL 1]

I've got a ding on my dome and was told it is too deep even for the Novus 3 heavy duty scratch remover, so I picked up some 600 grit paper...do I need to use circular or straight strokes? Should I just concentrate on the scratch or sand the whole dome evenly?

Thanks for your help!

Mike

[davichin 18]

We use this product applied with an old rag (you know, old underwear that I was able to save from my girlfriend´s audit...). Theoretically, for cars, it should be applied using a rotary polisher but I have polished many domes manually:

 

http://store.carcareeurope.com/product.php?productid=505

 

A friend bought it and shared it with everybody and it lasts forever. It works very well and it is also very easy to use.

[aquatic-eye 0]

Hi,

 

I have bought a micro mesh kit on eBay from a seller in UK. Price was cheap.

I used it on a used 8" dome I bought for a resonable price but had some little scraches.

Using the micro mesh it was like new.

It takes some time but it is very exciting to see a new dome coming up.

Very simple to use.

The polish cream is also good to renew the rings... good for womens ;-)

[simonmort 0]

Good product for scratches is a car product, crome metal polish.

Used to use it on headlamp lenses for bentley and aston and worked a dream.

 

Tend to use now for car windscreen and double glassing/ glass.

 

hope this helps

[stucotts 0]

Thank-you for keeping this topic pinned! I've known it was there and last week I set about taking care of my ports, I spent time going through this topic, reviewing the posts and responses.

 

The micro-mesh worked very well and I am set for my next dive trip.

 

Thank-you to all!

 

Stuart

[mvdvorle 0]

.

[Yellowmon 2]

Glass port scratches are as problematic as they are inevitable. Fortunately, it is possible to remove scratches in glass ports if the scratches are not too deep. Stephen Frink suggested to me I use "jewellers rouge" which I found on Amazon. I used a Dremel which has a power cord (when I tried with battery packs, ran out of juice before finishing) and a whole bunch of felt polishing wheels (catalog #414). It took a long, long, long time. Perhaps an hour but the minor scratches did disappear. I went through a number of felt wheels. It is a long and boring process but gives one time to reflect on the dangers of rocks attacking poor defenseless dome ports and to be more protective in the future. I write this now as I am preparing to attend to another session of polishing, which I hate as much, if not more, than cleaning the camera's sensor (also necessary this weekend). While you are out diving and having fun, think of a tiny wheel spinning round and round and be thankful if you have acrylic domes how much easier they are to repair.

 

I can't guarantee this process will work for everybody but so far it has done well for minor, hairline scratches and little dings. I hope this advice cuts into the sale of replacement Seacam domes, Harald is doing far too well these days.

 

Good luck!

[JohnA 0]

I used the micro mesh kit to remove 2 big scratches on the outside, and a scuff from the lens on the inside. It worked well, although the inside is much harder, it is doable. It is important to dry well between grits so you can see better, as I found I had to go back a couple of steps at the end to touch up a bit I missed.

[timrock 1]

Did anyone ever answer Karen's question in this thread? Is the marine mesh kit preferrable to the aviation kit?

 

ANy difference?

 

Best,

 

Timbo

[Kogia 3]

Glass port scratches are as problematic as they are inevitable. Fortunately, it is possible to remove scratches in glass ports if the scratches are not too deep. Stephen Frink suggested to me I use "jewellers rouge" which I found on Amazon. I used a Dremel which has a power cord (when I tried with battery packs, ran out of juice before finishing) and a whole bunch of felt polishing wheels (catalog #414). It took a long, long, long time. Perhaps an hour but the minor scratches did disappear. I went through a number of felt wheels. It is a long and boring process but gives one time to reflect on the dangers of rocks attacking poor defenseless dome ports and to be more protective in the future. I write this now as I am preparing to attend to another session of polishing, which I hate as much, if not more, than cleaning the camera's sensor (also necessary this weekend). While you are out diving and having fun, think of a tiny wheel spinning round and round and be thankful if you have acrylic domes how much easier they are to repair.

 

I can't guarantee this process will work for everybody but so far it has done well for minor, hairline scratches and little dings. I hope this advice cuts into the sale of replacement Seacam domes, Harald is doing far too well these days.

 

Good luck!

 

For those with damaged Subal glass ports, please be aware that they can be returned to Subal for replacement of the glass. While far from cheap, it is considerably less expensive than buying an entire new port.

[ghostcrab 0]

For those with damaged Subal glass ports, please be aware that they can be returned to Subal for replacement of the glass. While far from cheap, it is considerably less expensive than buying an entire new port.

 

I have a heavily used Sea&Sea compact dome port with several mostly minor scratches on it. While on a Live Aboard in late March, the Captain who was also the photo pro suggested I try using some of his "Harley-Davidson" (yes the motorcycle people) Swirl & Scratch Treatment and a lot of elbow grease. After 3 treatments I noticed a great deal of improvement and bought a bottle of the polish when I returned home. My next photography dive trip is in late Sept. so I plan to use the polish between now & then to see if I can restore the port to almost new. Will keep you posted as to my results.

[SGL 0]

I leave for the Galapagos in 8 days. I have about a 2 cm deep scratch on the 8" acryllic dome port. I have the micro-mesh NC-78-1 kit. I sure don't want to mess this up because there's no time to get a replacement dome before the trip. Can you tell I'm looking for reassurance...So I have to do the entire 8 inch dome port? I'm planning on doing it after dinner tonight. Is there anyway I could really mess this up? The instructions and the previous tips seem pretty straight forward? Is it really that easy? I'm paranoid to do it.

[MIKE POWELL 1]

SGL,

 

I hope you mean 2 cm long and not deep. I was leery the first time I tried it, but it turned out fine. Just follow the instructions and try to put it on a slip proof mat so it doesn't get away from you.

 

Good luck!

[rtrski 20]

SGL I used the liquid solution (Novus) and it worked, although from re-reading this thread I bet the micromesh would've worked even better. You WILL get a huge sinking sensation with the coarser starting point...don't panic, don't rush, and don't skip steps. That was my one mistake - I was so terrified by the 'scarification' the coarser solution made that I quit too soon and went to the finer stuff....only to finish and find that some of the big scratch was still present, so I had to start over.

 

Just resist the urge to 'focus' too much on the problem area (which I assume is a "2cm , deep" scratch") or else you alter the curvature locally in a way that might make a focal ripple. Time yourself, take rests if you feel like you won't have the endurance to keep going rather than risk sloughing off on a step...and trust in the force.

[SGL 0]

SGL I used the liquid solution (Novus) and it worked, although from re-reading this thread I bet the micromesh would've worked even better. You WILL get a huge sinking sensation with the coarser starting point...don't panic, don't rush, and don't skip steps. That was my one mistake - I was so terrified by the 'scarification' the coarser solution made that I quit too soon and went to the finer stuff....only to finish and find that some of the big scratch was still present, so I had to start over.

 

Just resist the urge to 'focus' too much on the problem area (which I assume is a "2cm , deep" scratch") or else you alter the curvature locally in a way that might make a focal ripple. Time yourself, take rests if you feel like you won't have the endurance to keep going rather than risk sloughing off on a step...and trust in the force.

 

 

Thanks sealifeprints and rtski for the encouragement. I should have done this a few weeks ago in case something goes wrong. I'll probably do this tomorrow morning! I'll report how it went when I'm done

[davehicks 123]

Thanks sealifeprints and rtski for the encouragement. I should have done this a few weeks ago in case something goes wrong. I'll probably do this tomorrow morning! I'll report how it went when I'm done

 

I polished my 8" acrylic dome for the first time a few weeks ago. I used the MicroMesh down through all of the grades and it did a good job with multiple scratches and dings. However at the end of the job I felt like it had a lot of super fine scratches that left it with a less the crystal clear look. I did a follow up pass with the two of the three Novus grades (medium and polish) and I am now happy with the results. The dome looks great, almost as good as new. I probably spent about 4 hours all told, mostly sitting in front of the TV watching movies. Give your self a couple of days to work on it in case of finger cramps!

 

Dave

[SGL 0]

Ok--If I can do it, seriously anyone can do it. I appreciate the tips from past posts, such as the need to use the sandpaper and micromesh on the entire dome and not just on the scratches, and that the dome would look like a diffuser but would get clearer and clearer as you use finer micromesh (thanks for the photos from an earlier post). Take your time and read the really easy instructions included in the NC-78-1 kit. It took me over 2 hours but I was being very precise. Although it doesn't look brand-spanking new, it almost does. I am very happy with the results and am ready to use it in the galapagos next week.

[Kogia 3]

Glass port scratches are as problematic as they are inevitable. Fortunately, it is possible to remove scratches in glass ports if the scratches are not too deep. Stephen Frink suggested to me I use "jewellers rouge" which I found on Amazon. I used a Dremel which has a power cord (when I tried with battery packs, ran out of juice before finishing) and a whole bunch of felt polishing wheels (catalog #414). It took a long, long, long time. Perhaps an hour but the minor scratches did disappear. I went through a number of felt wheels. It is a long and boring process but gives one time to reflect on the dangers of rocks attacking poor defenseless dome ports and to be more protective in the future. I write this now as I am preparing to attend to another session of polishing, which I hate as much, if not more, than cleaning the camera's sensor (also necessary this weekend). While you are out diving and having fun, think of a tiny wheel spinning round and round and be thankful if you have acrylic domes how much easier they are to repair.

 

I can't guarantee this process will work for everybody but so far it has done well for minor, hairline scratches and little dings. I hope this advice cuts into the sale of replacement Seacam domes, Harald is doing far too well these days.

 

Good luck!

 

I had been told by opticians and housing manufacturers that it is not possible to polish out scratches from glass domes: they must be replaced. However, after reading this post, I did some searching online, and found a DIY Glass Polishing Kit for $40 at www.hobbytool.com. I had a couple of scratches on my glass dome that were not deep, but close to 2cm long, and managed to produce really ugly black scars on the image files when shooting into the sun. To my utter astonishment, they disappeared after only about 20 minutes of polishing using an electric drill with the wheel, pad, and polish solution provided in the kit. Best $40 I ever spent. Thank you Yellowmon!

[Daehag 0]

What a nice information here!

 

Finally I got some scratches on my Ikelite 8" Dome Port, decided to go with Micro-Mesh. After 2 hours working while listening music, All scratches are gone.

 

Thanks a lot for all great information.

 

Daehag.

Edited August 29, 2009 by Daehag

[simonmittag 0]

What a nice information here!

 

Finally I got some scratches on my Ikelite 8" Dome Port, decided to go with Micro-Mesh. After 2 hours working while listening music, All scratches are gone.

 

Thanks a lot for all great information.

 

Daehag.

 

+1 on using Micro Mesh NC-78-1. Polished my Sea&Sea NX dome port which had 2 nasty 3cm long scratches with it. Aside from the big ones, the sanding process removed all the tiny scratches. The result looks indistinguishable from a factory new product to me.

 

I used all sandpapers wet, each step at a 90 degree angle to the previous one, and washed and dried the port between each step. Drying is not essential to the sanding process but it helps you see what you missed.

 

You can also easily wash the micro mesh papers at the end for later reuse. This was $50 well spent and the kit is small enough to travel if need be.

[Nicool 30]

Hi there,

Three months ago I've had a bit of salt water inside my Ikelite 8" dome. I ended up the dive and the camera was fine, cool.

Problems arrived after rincing the inside of the dome, and trying to dry it up: due to the shape of the dome's base, a bit of water couldn't get out!

So I stupidely dried it up manually, using a soft cloth. Now my dome has a lot of very tiny scratches in the inside, and I'm afraid they lower picture sharpness. At least they increase the rate of out-of-focus picture

So I may try the Micro-surface solution (thanks all for this advice!), but I wonder if it's not a hard treatment for my dome, considering that I don't have any big scratch.

Anyway, my actual question is: what would you do when you get water inside your dome? You can't just let it evaporate, you would end up with stains on the inside. How would you dry it and avoid those micro-scratches?

Maybe I should open a dedicated thread for this question?

cheers,

[rtrski 20]

I bet you can already guess from the experience of just trying to wipe out the dome interior out to the edges: it's going to be really, really difficult to get even pressure using any sort of finishing product on the inner dome surface. I personally wouldn't be willing to try it. Perhaps just some sort of "polishing" solution (that doesn't actually have grit) and a good soft buffer pad on a drill or something might let you get in there, assuming you can get a long enough extension on the drill shaft, and a pad size that runs all the way round to the edges.

 

Regarding how to clean the interior, try another cleaning this time after letting it soak a while to make sure all salt is dissolved, then wash with distilled water and some mild soap (liquid handsoap or whatnot - just make sure it doesn't have any solid surfactants or grit), then use something with good sheeting action for a final rinse (mix a little alcohol in with distilled water to break the surface tension, same as you'd use to put in your ears...or try a few drips of that "Jet-Dry" type stuff you put in dishwashers for sheeting action) so that the water at least runs 'off of' the dome. After the rinse, position the dome port-side down, tilting around to get rid of as much water as you can, maybe wicking with a paper towel or whatnot wadded up into the neck (NOT so far as to touch the dome - just to get the capillary action sucking water off that flat back face!), and let it dry like that. Any waterspots from drying will be on the plastic back, not on the dome inner face, assuming you got it clean and broke the surface tension so no 'drips' were left behind.

 

I just can't believe you're going to be able to get good even finger pressure and not make things worse trying something even with really fine grit on the interior, unless you've got far smaller hands than I...

Edited September 9, 2009 by rtrski

[Nicool 30]

I bet you can already guess from the experience of just trying to wipe out the dome interior out to the edges: it's going to be really, really difficult to get even pressure using any sort of finishing product on the inner dome surface. I personally wouldn't be willing to try it. Perhaps just some sort of "polishing" solution (that doesn't actually have grit) and a good soft buffer pad on a drill or something might let you get in there, assuming you can get a long enough extension on the drill shaft, and a pad size that runs all the way round to the edges.

 

Regarding how to clean the interior, try another cleaning this time after letting it soak a while to make sure all salt is dissolved, then wash with distilled water and some mild soap (liquid handsoap or whatnot - just make sure it doesn't have any solid surfactants or grit), then use something with good sheeting action for a final rinse (mix a little alcohol in with distilled water to break the surface tension, same as you'd use to put in your ears...or try a few drips of that "Jet-Dry" type stuff you put in dishwashers for sheeting action) so that the water at least runs 'off of' the dome. After the rinse, position the dome port-side down, tilting around to get rid of as much water as you can, maybe wicking with a paper towel or whatnot wadded up into the neck (NOT so far as to touch the dome - just to get the capillary action sucking water off that flat back face!), and let it dry like that. Any waterspots from drying will be on the plastic back, not on the dome inner face, assuming you got it clean and broke the surface tension so no 'drips' were left behind.

 

I just can't believe you're going to be able to get good even finger pressure and not make things worse trying something even with really fine grit on the interior, unless you've got far smaller hands than I...

 

Thanks for this very comprehensive solution rtski! I'm gonna try this, and it looks less scary than using the technique mentioned above

[glewbel 1]

I bet you can already guess from the experience of just trying to wipe out the dome interior out to the edges: it's going to be really, really difficult to get even pressure using any sort of finishing product on the inner dome surface. I personally wouldn't be willing to try it. Perhaps just some sort of "polishing" solution (that doesn't actually have grit) and a good soft buffer pad on a drill or something might let you get in there, assuming you can get a long enough extension on the drill shaft, and a pad size that runs all the way round to the edges.

 

Regarding how to clean the interior, try another cleaning this time after letting it soak a while to make sure all salt is dissolved, then wash with distilled water and some mild soap (liquid handsoap or whatnot - just make sure it doesn't have any solid surfactants or grit), then use something with good sheeting action for a final rinse (mix a little alcohol in with distilled water to break the surface tension, same as you'd use to put in your ears...or try a few drips of that "Jet-Dry" type stuff you put in dishwashers for sheeting action) so that the water at least runs 'off of' the dome. After the rinse, position the dome port-side down, tilting around to get rid of as much water as you can, maybe wicking with a paper towel or whatnot wadded up into the neck (NOT so far as to touch the dome - just to get the capillary action sucking water off that flat back face!), and let it dry like that. Any waterspots from drying will be on the plastic back, not on the dome inner face, assuming you got it clean and broke the surface tension so no 'drips' were left behind.

 

I just can't believe you're going to be able to get good even finger pressure and not make things worse trying something even with really fine grit on the interior, unless you've got far smaller hands than I...

 

Thanks a lot for this totally useful information. I used Jet-Dry plus distilled water, just as you suggested, and it worked perfectly.