So I sent one of the guys that helps me at my gun shop to the ATF question and answer meeting.... so ceracote question came up and ATF answer was that to ceracote a firearm requires the FFL to have a 07 manufacturer license since ceracoting a firearm is manufacturing a new firearm. This was questioned and the response was that it lengthened the normal life expectancy of the gun as originally made so it is now a new firearm and would need to be registered as such.... Any FFL knows where this is in the regs book? Just another stupid loophole.