The stripped lower receiver I got from Stag wasn't finished very well. Whatever coating they put on it scratched if you looked at it wrong and looked uneven. Which is odd because I have a complete lower half from them that is totally good-to-go.
Anyway, before putting the parts in I decided to finish it off with a better coating (of black, of course).
The prep work took 20 times longer than the painting. Hopefully this isn't a lesson in how to ruin a lower receiver.