You laugh, but I actually have a 1911 with a baked-on finish.
I built it in the late '80s out of a bunch of leftover and castoff 1911 parts I was tired of looking at in the "cigar box." Sarco was blowing out some re-parked GI slides for some ridiculously low price, like $25, so I ordered one and it came through as an Ithaca that looked brand new. I ordered an Essex frame for it (it would be my fourth Essex) and unlike the other three, this one came through with a weird purplish-brown finish. The other "cigar box" parts had a variety of finishes, mostly some sort of bluing. The assembled gun looked like ass.
So I bought mail-order a green can of some product I remember the name of as "Gun-Kote." Directions called for thoroughly degreasing parts before spraying, which I did for the frame and slide, and then masked off the slide rails. This paint smelled gawdawful--it no longer looked like ass, but it now SMELLED like ass. The directions said to bake the thing in an oven for one hour at 400*F, which I did in our kitchen. When cured, the paint no longer stank, it just looked like medium gray, semigloss Teflon. Sounds funky, but this was actually an improvement.
Now, here's the punchline: This thrown-together backbirth, built out of leftover and unloved junk that had been taken off of four or five other guns (including a barrel I considered junk), turned out to be flat-out
the most accurate 1911 I've ever shot, and I've shot some good ones. It's not easy to shoot with its tiny USGI 1911A1 sights, but it's capable of printing cloverleafs @ 25 yards if you can concentrate on those wretched little sights. Not bad for a gun I have less than $100 cash money in (slide and frame).