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topic 51130

How to remove scratches from stainless with a clear coat on it?

Some clearcoating solutions (adv.)    g j nikolas banner   everbrite banner  

A discussion started in 2009 but continuing through 2019

February 3, 2009

Q. I have a dozen LG stainless steel door refrigerators that have some scratches on it. There is a clear coat on top of the stainless. How can I remove the clear coat (What product should I use?) so that I can repair the scratches (What product should I use?) and then re-apply the clear coat (What product should I use?)? Thanks!

Ellen Way
superintendent for General Contractor - Los Angeles, California


February 5, 2009

A. That all depends on what the clear coat is. It will probably require a very strong solvent such as MEK / methyl ethyl ketone which is not user friendly. I would use the same clear coat as LG used as it will be the best for the cost.

James Watts
- Navarre, Florida


September 19, 2009

A. Hi Ellen,
First determine if the scratches went through the clearcoat and did in fact scratch the stainless underneath. If not you may be able to just spray/fill and buff an automotive clearcoat. (cheap and relatively easy fix)
Now...
Depending on what the clearcoat is composed of will determine which way to remove it. You can first try a furniture stripper containing Methylene Chloride, Dichloromethane, DCM (same thing different name :) I have used one in the past that came in a gel form and you just paint it on, leave it for 10 mins or so, the clearcoat will bubble up and flake, then you wipe off. If you don't feel like doing it yourself you can bring the panels to a degreasing shop that has a DCM vapor degreaser (due to environmental concerns not sure how hard it will be to find a shop who still uses these with DCM)
If that doesn't take it off it could be coated with an epoxy or polyurethane clear coat which is a pain in the neck to remove chemically. You may have to abrasively remove the clearcoat with the grain. (about the only thing good about doing it this way is you remove the scratches at the same time.)
Once you got the clearcoat off you can use a sanding block with 120-220 grit sandpaper and SAND ONLY WITH THE GRAIN!. Then blend with a red scotch-brite pad WITH THE GRAIN ONLY!
This process is an art so practice on a piece of stainless. Don't be discouraged if you can't replicate the original machine made finish. Try using a guide to rest the sanding block or your hand against that is positioned in line with the grain.
I REALLY don't like the idea of manufacturers using clearcoats on stainless for the very reason you posted your question. I think there reason is, they used lower grade stainless and clearcoat to increase the corrosion resistance or, clearcoat to make cleaning easier, and less susceptible to fingerprints. If they have to use clearcoats I wish they would make them hard and thick enough not to allow most scratches to reach the stainless underneath, and to allow refinishing as I explained in the very beginning.

If you absolutely are convinced to re-clearcoat, try using a product called Nylac; its pretty good as clearcoats come.

I have had stainless appliances for 6 years now and all I ever use to clean is mild soap, water and NON-ABRASIVE regular sponge. And then remove streaks with Windex again only with the grain. This has served me well and the appliances are as new.

Cliff Kusch
electropolishing shop - North Vancouver, British Columbia, Canada



April 27, 2019

Q. I have a related issue.

There's a scratch on my 1 month old stainless LG dryer. The scratch doesn't seem to have gone through the clear coat. However, the clearcoat seems to be some sort of plastic cellophane or something similar ... Is it how a regular automotive clearcoat normally looks like?

I'm not an expert at all in this field, so this really confuses me.

Thank for your help!

Mike Grandmaison
- Montreal, Quebec, Canada


May 2019

A. Hi Mike. A 'clearcoat' is just a paint-like coating which is clear rather than colored. Yes, all (or at least most) cars have a clear coat on top of the other paint. But whether your appliance still has some sort of cellophane/plastic shipping wrapper still in place is hard for a reader to know.

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
finishing.com - Pine Beach, New Jersey
Striving to live Aloha


May 18, 2019

A. I am encountering the same problem although it was more so by accident. I had some tough to remove stains so I pulled out my steam cleaner and it removed the stains but also parts of the clear coating. The problem is my steam cleaning attachment is so small it will take forever to get it all off. I was looking for another solution but now I think I'l try grabbing my steam mop taking the cloth off the bottom and try with that.

Mareline Merlan
- Palmdale California USA

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