DuraCoat is a hard polymer that’s self-lubricating to certain extent; extremely hard, oil, solvent, and wear resistant.
CeraKote is a dry film ceramic coating with special properties and attributes specially suited to tight tolerance applications and high-wear internal parts, such as bolts, bolt carriers, barrels and 1911 barrel bushings, etc. In addition when applied to certain internal firearms parts, it helps to reduce carbon fouling by resisting carbon adhesion, which promotes reduced maintenance, easier cleaning and improved operational reliability.
Gunkote is a durable, second-generation epoxy, thermo-set resin finish that will not break down, peel or dissolve. In fact, once it’s applied, the only way to remove it is to abrasive blast the part. It is resistant to all known gun solvents and thinners.
All three can be applied to stainless steel...