I've never seen people get so excited over a crayon before. Next up on Sesame Street, the letter 'C' 
Anyway, I got four words for you guys: Acrylic polymer paint (don't use regular model paint, get the paint made for use on polymer)
Whoops, thats only three, ok the fourth one is: Sealant
I make my own custom suppressors, and I buy OEM unmarked polymer cases for them for storage. When I mark the cases I stamp the information of the suppressor on them and then use the paint to color the letters, just like you guys want to do. Let it run through the grooves and fill the letters, clean up any excess, dry it, seal it, will last a longggg time. If you screw it up don't blame me. Be real careful when applying it and there will not be much to remove and keep it in the grooves.

Anyway, I got four words for you guys: Acrylic polymer paint (don't use regular model paint, get the paint made for use on polymer)
Whoops, thats only three, ok the fourth one is: Sealant
I make my own custom suppressors, and I buy OEM unmarked polymer cases for them for storage. When I mark the cases I stamp the information of the suppressor on them and then use the paint to color the letters, just like you guys want to do. Let it run through the grooves and fill the letters, clean up any excess, dry it, seal it, will last a longggg time. If you screw it up don't blame me. Be real careful when applying it and there will not be much to remove and keep it in the grooves.
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