I got a white painted serial number on a 1926. What's the safest way to remove it? And no I have no clue as to exactly what it is. Not something I would ever do!
First thing to try is a good solvent. Acetone (but don't get downwind of it), cigarette lighter fluid, even Hoppes, either kind. Put some on, let it sit a while and scrub with an old toothbrush.
I don't know what kind of toothbrush you're using, but my old ones don't melt in contact with either Hoppes ( No 7 or Elite) or lighter fluid. Don't know about acetone.
It comes out pretty easy. Seems to me I used my wife's nail polish remover and an old toothbrush years ago. Or maybe it was Hoppes. I forget. Either way, even if it does dissolve the bristles, who cares?
Got most of it out with Hoppes and a Q tip. One number is still pretty solid. Forgot to buy alcohol yesterday. Will try that next.
Thanks for all the advice.