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Posted By: red_green17 Stainless trim scratch restoration - Sat Dec 05 2020 11:50 PM
Anyone have any advice on how to restore stainless exterior trim from fairly light scratching and scrapes?

I have been working in my Gilbarco 996 exterior trim lately but have been unable to get the polished, fresh chrome shine. I could easily buy aftermarket replacements, but want to reuse these as they are the original ones and want the satisfaction of the sweat equity.

My original understanding was to go over it with a nice wet sand between various grits to get the scratches out before giving it a good polish. I was using some of my automotive chrome shine with both a hand polish and later with my dremel. Unfortunately my test piece has not responded well to this. While the scratches have somewhat come out, little has changed to the finish beyond clouding the metal a bit. One trim piece had some flaking top layer, so I am hesitant to go at it again with another go of sandpaper.


Has anyone else done something that worked for these?
Posted By: T-way Re: Stainless trim scratch restoration - Sun Dec 06 2020 09:16 PM
If it has a flaking top layer - it's not stainless, it's chrome.

And sanding chrome I never a good idea.

Later . . .

Jim
Posted By: Speedracer Re: Stainless trim scratch restoration - Sun Dec 06 2020 09:28 PM
If it’s stainless, I use my buffing wheel and everything comes out great. But you have to be careful because you slowly lose material in any process and you could wear it too thin.

And Jim is absolutely correct about chrome. If you sanded it and a copper color started to show, you have chrome.

I have a few 966’s and I’m pretty sure they are stainless, but not 100% sure.

-Steve
Posted By: red_green17 Re: Stainless trim scratch restoration - Sun Dec 06 2020 09:33 PM
Thanks gents.

Definitely saw some flaking around the screw holes. Its not a copper colour however, but more of a darker colour. So a black or grayish black. I'll try to snap a picture tonight to show what I mean.

I havent seen much online about these gilbarcos but the little I have seen is either that its stainless or believed to be stainless, so I am pretty much at a loss on these.
Posted By: Paul Bell Re: Stainless trim scratch restoration - Mon Dec 07 2020 06:34 AM
Could be a pot metal with a nickel coat, something like that. Using a dremel isn't going to cut it. Harbor freight has $40 bench grinders, get some red and white compound, and a polishing wheel and a cutting wheel (something with fibers in it, can't remember the technical name right now). For some reason, most hardware stores dont sell the good cutting wheels, just the ones that do final polish.

Harbor freight also has small scotch-brite type pads that can be attached to an angle grinder, good for prepping the surface.

Almost any metal can achieve a high shine, steel looks great polished correctly. Problem is protecting it if it corrodes. If you polish something that corrodes and you dont want to plate it, you can clear coat it with something like "ProtectaClear", its a clear that flows well over bare metal.

Polishing metal is pretty much an art, going to be a learning curve.
Posted By: Paul Bell Re: Stainless trim scratch restoration - Mon Dec 07 2020 06:47 AM
Almost forgot, stick a magnet on the piece. Will help tell you what it is. Steel and most pot metal will stick to the magnet. Aluminum not at all, and most stainless wont at all either....
Posted By: fuelboy Re: Stainless trim scratch restoration - Mon Dec 07 2020 01:48 PM
I've had good luck using fine steel wool on stainless and then buffing it out like Steve mentioned with great results.
Posted By: red_green17 Re: Stainless trim scratch restoration - Mon Dec 07 2020 05:12 PM
Here is a picture of what I mean. This is the front/back trim pieces and on this one I noticed flaking around the screw hole. Its sure possible the screw over the years helped to get it to this point, but I noticed it getting a lot worse (to the point of what we see) through some buffing with a cloth and metal polish.

Interestingly enough I tried the magnet test (did not even think to try that before) with a new magnetic shop hook I recently got. It stuck really well, so definitely steel or pot metal.

Attached picture 20201207_120602.jpg
Attached picture 20201207_120552.jpg
Posted By: Fingwing Re: Stainless trim scratch restoration - Mon Dec 07 2020 05:39 PM
Stainless can also be magnetic, depending on the percent of Fe in the alloy. In this case thought, it appears to be steel that has been plated - looks like it might be nickel or tin though to my uneducated eye. I'm pretty certain it is not pot metal base because pot metal would not take the dent that is shown in your photo. It doesn't look quite shiny enough to be nickel to me but nickel is softer than chrome so maybe it has been dulled by the rubbing? It should not be too costly to have it stripped and replated at a local shop - it you have one.
Posted By: red_green17 Re: Stainless trim scratch restoration - Tue Dec 08 2020 11:48 PM
Yeah I have a few dents to bang out still.
I never thought of checking with a repair shop to strip and replate. I suspect there is one in the city somewhere and this would be a cheap job, although I hope it isn't "too small" of a job.
Posted By: Fingwing Re: Stainless trim scratch restoration - Wed Dec 09 2020 02:24 AM
Originally Posted by red_green17
Yeah I have a few dents to bang out still.
I never thought of checking with a repair shop to strip and replate. I suspect there is one in the city somewhere and this would be a cheap job, although I hope it isn't "too small" of a job.

I've never done it with a gas pump - yet - as I'm doing my very first one now, but I did a complete redo of a very nice wood burning kitchen stove and I had all of the brightwork stripped and nickel plated and there was quite a bit of it. It was what I considered quite affordable - and money was pretty dear at the time.
Posted By: Paul Bell Re: Stainless trim scratch restoration - Wed Dec 09 2020 07:45 PM
Originally Posted by red_green17
Yeah I have a few dents to bang out still.
I never thought of checking with a repair shop to strip and replate. I suspect there is one in the city somewhere and this would be a cheap job, although I hope it isn't "too small" of a job.

Here's a link to my brothers "how-to" on fixing stainless trim. Your part may not be stainless, but similar process.

http://www.bumpsides.com/stainless/

Not sure where you are in California, but maybe five years ago I used "Avenue Plating", I think that was their name, did some nickel plate for me. They are in Redwood City in the bay, did a pretty good job. Nickel plate usually isnt too expensive, chrome gets pricey. If you want to save money prepping the piece saves a lot if you do it right. Your job isnt too small, I was doing similiar size jobs.

There are also spray on chrome-like processes now that are quite good. Im going to have maybe a one foot by 4 inch bezel chrome painted soon, it'll be about $100 but Im doing all the prep. Guy near me does it. It would be crazy expensive to do normal chrome on my piece. Believe its spectra chome or a similiar one,

I know there is a chance that stainless is magnetic, highly doubtful tho, and if it is wont be like steel is magnetic. Compare a piece of steel sheet metal to your piece via magnet to know, although from the picture it looks plated.
Posted By: red_green17 Re: Stainless trim scratch restoration - Sun Dec 20 2020 01:41 PM
I believe I have everything I need for the bench grinder, so am going to have to set it up again and give it a try for a nice buffering.
Posted By: fuelboy Re: Stainless trim scratch restoration - Sun Dec 20 2020 01:48 PM
Be very careful with that! Not just for the sakes of what you are polishing but there have been some horrible accidents from buffers ripping things out of hands and sending it flying.
Posted By: buzzy56 Re: Stainless trim scratch restoration - Sun Dec 20 2020 06:08 PM
I second that . Years ago polishing 56 Chevy stainless it was ripped right out of my hands flew across the pole barn and stuck in the 4” insulation in the wall . Lucky nothing was in it’s path . Would have been devastating . Split second . Proceed with caution as one has already stated .
Posted By: red_green17 Re: Stainless trim scratch restoration - Mon Jan 04 2021 08:54 PM
Thanks gents!
I have had some interesting close calls with the bench grinder in the past. I have a small side business making things out of old railway spikes and often will use the grinder and wire brush wheels to prep them. Lets just say, I am thankful I was smart enough to wear glove and eye protection!!!!
All that to say, I am a rookie with buffering, so can believe that it can be considerably easy to get myself into trouble. At this point I have my grinder put away for the winter as I need to store both cars in the garage (the garages in new homes leaves a lot to be desired when it comes to space). So will be waiting to get my hands wet come spring. I have had decent results trying to hand polish on the bench, so am very hopeful the bench grinder is the solution here.

Buzzy - I really hope I don't get to see what that is like in real life!
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