What and where can I find the ink that is used to fill in the numbers on the bottom of the golf club?

QUESTION:
After hitting from the rough a few times I noticed that on the bottom of a couple of my golf clubs the paint filling was partially scratched off and I can’t seem to find a place that sells the “paint”. I’m sure I can go into any repair shop and have it done, but it doesnt seem like a hard thing to do as long as I have the paint. Anyone know where they’d sell it either retail or online? I’m located in the Bay Area.

ANSWER:

Answer by cottagstan
I’m betting it’s not ink, but an epoxy paint.
You may be able to pick it up in small quantities at a hobby shop. Good luck.