So I picked up a product on eBay that advertises that it can help remove scratches on coin slabs. I heard about it recently, right here on CoinTalk. It's called Slab Renew, and below I plan on documenting my my experience as I try and remove from scartches from a few slabs that are in really bad shape. (I am in no way affiliated with this product). If you aren't familiar with the product, here is their webpage. http://slabrenew.com/ I started with a coin I planned to reholder, since it was in such horrible shape. Multiple deep scatches directly above the coin on both the Obverse and Reverse. I figured if all this paste did was add a million hairline scratches to my guiinnie-pig slabs, it would bhe no big deal. Here are some older photos of the first coin I tried: I followed the directions and (1) shook the bottle (2) applied a few drop directly to the slab (3) rubbed in a circular motion. I am using a yellow microfiber polishing cloth. I took these images tonight, on a tripod, closeup, with a ton of light, althought not neccesarily color corrected or adjusted as much as I normally would in post processing. I aligned the images as best I could, so you can easily see the improvement, if any. Before any work: After 45 seconds of work: After a second round of work, another ~45 seconds of vigorous scrubbing: I think you'll agree it helped. I'm trying to determine if it helped remove noticible scratches at the expenese of the opitical quality of the slab in other areas where there weren't scratches / scuffs. I'm also wondering if the slab will get "hazy" after a few days / weeks. I'll post back. I plan on next doing a NGC coin and posting those results in this same thread. If you have some slabs you plan on reholdering, I think this product or similiar products are definately worth a shot. They are not that cheap, so keep that in mind. This was around $17 shipped, and the cloth will be a few more bucks. Still, fairly amazing results at first glance. I will also be trying toothpaste as a viable alternative. Cheers, geekpryde
the best product i have found is sold thru glass shops. a plexi glass polish. I think made by CR Laurence. I had a GSA slab that was just horrible and with some elbow work it was a whole new slab. have used it since on many scratched slabs. I add a bit of water while polishing. some several years ago with no haze showing. about $10 for a 10-12oz bottle.
Here is the NGC test using Slab Renew. I think the former owner took sandpaper to it! Before any work: It Begins! After ~45 seconds of scrubbing: After a second round: Results are fairly dramatic. But this slab is still in bad shape and probably should be replaced. You will note, that between the last two photos, it looks like I removed some scratches but added some others. (parallel lines from eye to nose for example). I may do some more work on this one, as the directions for Slab-renew clearly state that NGC plastic is harder than PCGS plastic, and requires some additional elbow grease.
Try this, available at your local automotive shop for less than $10 a bottle: http://www.meguiars.com/en/automotive/products/g12310-plastx-clear-plastic-cleaner-polish/
You can buy plastic polish at most any auto parts store for only a few dollars. Most any of them will do the job. Really deep scratches are a different story. It's tough to remove those by hand.
Test 3, some really nasty, DEEP scratches. 1 round of scrubbing, before and after: Scratches are still there, but they dont distract the autofocus as much, and reflect less light back. Ultimately, they are alot less noticible in my opinion.
I could probably take them out up to the finest polish with the fine abrasive papers i use in sharpening my tools to a razor edge
While not a miracle product, it is certainly something I am happy I bought, and I will definately be using it on all future scratched slabs, assuming the results are stable. Sorry for the pink whitebalance on this one, I am using mixed color temps on the bulbs,
Or better yet a product other then alcohol that make a girl that looks like sba looke like miss liberty on the st gaudens $20 or the walking half
I don't really care about scratches on slabs except for their effect on photos. So, for scratchy slabs I carefully place a puddle of mineral oil on the slab over the coin which completely completely covers the coin. After the photos are taken I sop up the oil with tissue and then remove the remainder with Windex. repeat for photos of opposite side.
Interesting method. I wonder if it would be less work buffing than repeating this each time. Some of the scratches on my coin slabs are so bad, I really couldn't see the coin, which was bad for pics, but also for just viewing then or showing them to others. I'm assuming you don't have coins this bad off?