I use "bake on" finishes in a professional capacity with all the correct equipment, including Mil-Spec oxides for prep, and encounter problems sometimes!
The real "bake on" stuff is a different animal all together.
The best stuff for the hobbyist that I have seen that does not require subsequent heating, is the Aluma-Hyde from Brownells.
The formula has been modified I believe, and if done properly is very durable.
You must prep the surface to the moon however. Bead/oxide blast, or good sanding, a thorough de-grease, and good spray techniques are required.
And last, but not least, do not even touch the sprayed part for 2 weeks. I am not joking, it will take that long to cure, no matter what anybody tells you. I use a paint "hardness tester", similar to a Rockwell hardness test, so this is fact.
Unless you use some nuclear bore cleaner, it will hold up great.
The bake on stuff really needs a pro install for durability.
K-G Guncote, if done properly, by the way, is about as durable as it gets. Brownells does sell it, but it is really for a pro. :thumbsup: