Hilario Lugo does automotive/motorcycle engraving, also teaches classes.I think he’s hlugo on insta. You can probably see in his posts what equipment he has and the insane turntables he uses for bumpers.
I’ve heard to steer clear of glock. However, there are aftermarket slides from other manufacturers that are much better to engrave. There’s is also a thread somewhere on here that list which firearms are known to be problems.
That’s funny, I have been doing this exact same thing for close to a month. I made a joke that they may very well be the most expensive juction box covers in the world, but now I definitely know they’re not. Nice work.