Dusty Stevens
Shiner
If you sharpie in the extractor groove you can walnut tumble it for 2 weeks and not remove it.
I actually tried that but didn’t have much luck. Wasn’t crazy about digging into the case wall. Need to figure out some sort of etching process.I've noticed that if you write on a case with a magic marker, then heat it, the marks are hard to remove with any solvents. What about using a metal marking engraving pen, the ones that vibrate?