Now, just for the fun of it ---- get a piece of wet/dry sandpaper 600 grit or even 400 grit. Put a few drops of water (between you and me, spit, aka saliva works best) on the sand paper. Take the green CC chip and and rub on the lubricated paper (which lays on a flat surface) in a circular motion. You'll know when it's working as the liquid will turn green.

After the surface looks perfect, dry and rub in some baby oil. I use baby gel. I leave the gel on the chip and put it aside for an hour or two. I then take a piece of paper towel and dry it off.

A crest and seal has clear celluloid protecting the inlay. No problem using the above method. If the chip is quite worn, be careful. You don't want to sand away any of the inlay graphics

By the way for the horrified coin collectors, chips are not coins. Have fun.