Re: cerakote question
Most mechanical engravers will cut throught the Cerakote just fine it you are trying to engrave after coating, which doesnt makse sense to me.
If you engrave before you Cerakote the pistol the Cerakote will not fill in engraving that is three thousanths or deeper, as its surface thickness is only .1 mil or one thousandth thick.
Most CNC mechanical type of engravers cut at 5 thousanths or more in depth, so yo should be fine and the edges of the engraving remian crisp.