[GWoolfrey]

If its laser etched.. I agree with using the marker or a flat black testers paint to paint inside and immediately wipe it clean outside the etching. Painting it over is the best way to go if you're going for the new look.

Orange hand cleaner soap (the stuff mechanics use to get grease off their hands.
Its very very useful for removing many things.. Hell... I even use it to wipe rust off my bumper.

If that is not strong enough, you can try gasoline.. but that might strip the paint off all together and damage any rubber it touches. Gasoline is a like a very strong paint stripper. You could try nail polish remover.. but that might be too weak.

or a very very fine 800-1000 wet sandpaper and some time and patience. But really... is this something you plan on selling on the future or playing the shit out of. If so, use some sandpaper and give it some character. I completely sandpapered my P226 and it came out really nice. (I also used some extra fine steel wool). But Be careful... you could lose your trades very easily if you rub too hard. If you know somebody with a sand blaster.. that would be great too.