[warewulf]

Labels might be your best bet assuming there's some sort of recess in the chip. As far as hot stamping, usually places will only do it if you buy the chips from them. Is the place you bought them from still in business? You might be able to send them back and have them stamped.

As far as writing on them -- bad idea. No matter what kind of ink/paint you use, it will start to wear off with use and will look terrible. I play in a game every now and then where the guy decided to draw edge spots on diamond chips with a Sharpie. Words can't describe how incredibly lame they look. Every new player to the game looks and eventually says in disbelief: 'Did you ACTUALLY draw these spots on?'

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