Well I tried my hand at it and I'm very happy with the results. I used nail polish and non-acetone nail polish remover. Just coated the whole area not worrying about just the recesses, waited for it to dry and gently wiped off what I didn't want. A few coats and bit of headache and we're good. Wanna get a better red for the fire though.
Did my Glock slide too
Sorry about the crummy pics, couldn't find my camera.