Removing the hot stamps with isopropyl alcohol will take about 10 minutes a chip, but will do the least damage to the chip.

Removing them with non-acetone nail polish remover will take 5 seconds, but if you leave it on too long, it will make the center of the inlay image "fuzzy". Fuzziness depends on how long you leave it... If you are careful, you will not damage the chip, but don't leave it on unattended.

Steve are you selling primaries, like in the picture, or secondaries? Used condition?