Love my "home shop" powder coating system. it is a cheap durable painting method.
I learned.. hot up the part, it burns off the fingerprints and other minor things that stop the powder from sticking to the part. Big shops have wash tanks, strip the part, ph modifiers that stop spots when it dries..
I heat it up to 400, shoot the coat hot, it "flows out" and then you bake it..
Baking.. what I have learned is the powder goes through a set.. heat it up to where it "flows out" and looks shiny (from velvet to shiny) like "SOLDER", then bake it the "ten minutes" the powder company requires..
difference is.. a "soft set" that never cured you can scratch off with a fingernail versus a super-hard coating you can't get off even if you want to. IF you over-bake it, it looks cracked open like the desert soil..
THICKER metal takes longer to get to "flow out" temps.. thin metal is quicker, mass and acceleration.
If you find a easy way to "remove" the baked on cured coating, share it..
I got success pictures, don't have the pic size reduced where I can share..
MY OVEN, a free kitchen oven, the thermostat is a bulb type (stock) that keeps the temp within 2 degrees of setpoint.. I (being a madmodder) cut the back out of the oven and extended it deeper where I can get car oil pans and valve covers in it. I kinda wished I had took two ovens and welded them back to back, doors on both sides.. (could bend pvc easily then..)
Powder coating makes a excellent sealer-primer.