ICANHITHIMMAN- I am familiar with the other coatings you suggested (cerakote etc..), but my understanding is they are not able to be used on the BAT action (and probably many other custom actions) because of the tight tolerance of the action. Additionally, the melonite treatment can be coated over with cerakote. So, for my build I could choose to cerakote the barrel, exterior of the action and bottom metal. But the internals of the action, including the bolt, would stay black from the melonite treatment and not receive cerakote. So you would have the ability to refinish or change colors of finish on the exterior metal of the gun if you so choose.