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Removing scratches from a dome port


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#141 Lukev95

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Posted 24 October 2018 - 11:34 PM

This is the sort of thread I was hoping I would find here.
The acrylic dome port that came with my secondhand aquatech housing had a few deep scratches. Going off the recommendation of the people at aquatech I got the novus kit. it worked ok but I cant get it up to a perfect clear finish and it looks like it has thousands of tiny scratches in the acrylic. Ive spent hours trying to gently polish them out but its not working, somehow theres more scratches on the inside of the dome than out so Im thinking the micro mesh is the way to go here....
Has anyone else had this issue with the novus system Or am I doing something wrong?

#142 JohnF

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Posted 09 November 2018 - 12:37 PM

This is the sort of thread I was hoping I would find here.
The acrylic dome port that came with my secondhand aquatech housing had a few deep scratches. Going off the recommendation of the people at aquatech I got the novus kit. it worked ok but I cant get it up to a perfect clear finish and it looks like it has thousands of tiny scratches in the acrylic. Ive spent hours trying to gently polish them out but its not working, somehow theres more scratches on the inside of the dome than out so Im thinking the micro mesh is the way to go here....
Has anyone else had this issue with the novus system Or am I doing something wrong?

 

I have the same issue as Luke. I used the Novus polishing kit to remove some scratches from my knekt dome for my go pro. It did an okay job removing most of the large scratches but left a ton of smaller scratches that are visible when looking into direct light. Is there any way to fix this other buying the micro mesh kit? Has anyone had great successes using the Novus kit?

 

Any insight would be very much appreciated.



#143 Apocolibri

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Posted 26 November 2018 - 11:52 AM

This is the sort of thread I was hoping I would find here.
The acrylic dome port that came with my secondhand aquatech housing had a few deep scratches. Going off the recommendation of the people at aquatech I got the novus kit. it worked ok but I cant get it up to a perfect clear finish and it looks like it has thousands of tiny scratches in the acrylic. Ive spent hours trying to gently polish them out but its not working, somehow theres more scratches on the inside of the dome than out so Im thinking the micro mesh is the way to go here....
Has anyone else had this issue with the novus system Or am I doing something wrong?

Hi Luke,

The Novus product is made for flat sheets of acrylic or plexiglass... like that used in picture frames.  So while it does an excellent job removing superficial scratches from these sheets it's not designed to remove the microfine scratches you're seeing on an optical port.

First, make sure you're using a soft flannel cloth and nothing else for the final polishing step.   Next, go to this website: http://micro-surface...cro-finish.htmland go to the left side of the page and click on: Products by Type.  That will take you to: Micro Gloss #5.  This will remove 9 micron scratches.  Next use their Micro Gloss Liquid Abrasive, Type 1 Cleaner and Polish, again with a soft flannel cloth (also sold here under Products by Type/Flannel Cloth).  This will clean 1 micron scratches.  Finally, use their Micro Surface/Micro Finish Polish to complete the job.  The 2 oz bottles plus the flannel cloths will run you under $26 plus postage and these will restore your dome to it's original finish.  

I tried the Novus products, which I've used for years to polish sheets of acrylic glazing for picture frames, and it left a haze with fine scratches that could be seen in a directional light.  I also mistakenly used a micro fiber cloth, which I was later told to never use for applying the aforementioned polishing compounds by a Tech Rep at Micro-Surface Finishing Products.

You can be penny wise and pound foolish by trying to do this on the cheap... but if you want the best results I'd suggest the products mentioned above.  I made the usual mistakes before finding this company online and I'm stoked that I did.

Lawrence



#144 reefsafe

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Posted 21 December 2018 - 11:33 PM

I recently had to polish out a fairly good scrape. I tried Novus liquid first but it was too deep so i ordered this sand paper kit from Amazon and went through the whole stack. Finished it off with Novus #2 and it came out great...

 

https://www.amazon.c...0?ie=UTF8&psc=1


Edited by reefsafe, 21 December 2018 - 11:34 PM.


#145 simonK

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Posted 22 December 2018 - 12:47 AM

Toothpaste works well fo light scratches.

#146 tgait

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Posted 17 June 2019 - 02:14 PM

Great info here. I didn't see it in the thread, but I have a Nauticam 8.5 inch acrylic dome.  It looks like the flanges are removable before polishing, but before trying that, I thought I would check to make sure they actually are before I ruin the water integrity of the my dome.. :)



#147 Mike_ts

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Posted 19 June 2019 - 03:08 AM

Great info here. I didn't see it in the thread, but I have a Nauticam 8.5 inch acrylic dome.  It looks like the flanges are removable before polishing, but before trying that, I thought I would check to make sure they actually are before I ruin the water integrity of the my dome.. :)


Could you get the shade of?

Also, if the scratches are not too deep, just many small ones, would you guys skip a few of the micro-mesh pads going straight to a higher number?

#148 davehicks

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Posted 19 June 2019 - 06:40 AM

I would just go ahead and run through the whole stack.  It may not be required to spend as much time on the roughest levels, but it won't hurt to start there.  

 

I usually sit down in front of a movie for 2hours with a towel on my lap, bowl of water to wet and rinse the paper, and the dome.  Use the Novus at the end to finish up. 


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#149 Woody1474

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Posted 10 July 2019 - 12:53 PM

Thanks for the info guys - been searching back and forth online for weeks re minor scratched. Should have tried here first