From this experience, the anodizing was really poor on it. It had a lot of shiny spots worn through just from the jig and the milling process, which shouldn't have had any bearing on it whatsoever, but it did.
And why I painted it.
Cerakote is the best finish, next to anodizing that you can put on it Mike. There are 2 types. the kind that you have to mix with a hardener and bake afterwards, or air cure. The air cure is pretty tough in its' own right on scopes and plastic and such that you wouldn't want to bake. But the 2 part/bake is a little better overall.
A 4 oz bottle will do many lowers. Or complete guns and accy's too for that matter.