Any Cleaning Methods/Advice For Scratched Slabs?

Has anyone tried wood ashes. It cleans and shines coins nicely. Ive tried it on pre 1982 and 2017 pennys.

And damages them so most collectors won't want them. And if they had any numismatic premium, a great deal of that premium would them be gone.

Not everyone has a dealer nearby. My local dealer, who did two or three reholdering/submissions for me over the last year, told me on my last trip in that they're not doing that anymore. In return, I'm not going back again either.

Polishing a slab may not make them perfect again, but it can help a whole lot. If the scratches are minor, it can look like new. If they're as bad as the OP suggested (and the pics are long gone now), it could still be an improvement. This is what I got from one dose of Plat-X, before and after:

I've had exceptional luck using polishing compound bars and elbow grease even on bad deep scratches on automotive plastic parts as well as the headlight lenses.

Something like this
https://www.amazon.com/Blue-Polishi...p/B004DZDLPY
That some sand paper and a variable speed buffer and a couple buff heads a heavy one and a fine polishing one.

Yeah it's a bit expensive to take a scratch out of a slab, but I have all this stuff redily avaliable at work.
100% it will bring back headlight lenses with pitting and white film and key scratches back to crystal clear. I don't see why it wouldn't do the same on a slab.gotta sand well to smooth then fine polish until clear.

You could probably fine grain wetsand it also and go finer and finer until you reach polishing fineness.

Basic idea is to sand the large scratch out to the same level then polish the finer scratches away with a really fine polish, same way to get rid of scratches in car paint.

You could probably try a few different ways on a piece of plexiglass to see the results before trying the slab, but I have to warn you it takes time and elbow grease to completely remove a scratch and make it clear again. A lot of time and a lot of elbow grease.

And the headlight cleaners do work, just most people don't do each step long enough, especially the first step, to get rid of the heaviest scratches in the lens before the finishing steps. If you polish white corrosion on plastic or deep scratches they will still be there. You have to get down below the scratch or the white corrosion to get it clear again.

Anywho, there's good, cheap, and fast. From my experience you can never have all 3 at once, the best you can get is two of those three things at once.

Ah, it's just a misspelling. The product is PlastX.

I saw product called Slab-Renew on ebay. They claim it works well on PCGS and GSA plastic but I have not tried it.

Wow! Thats a great improvement.

Well done!