I'm a certified Cerakote applicator and will tell you straight up that Cerakote is NO WHERE NEAR the durability of bonding applications like NP3, Ionbond (I've heard bad things about it though), hard chrome, etc.
They are two different animals. There is a lot of hype out there about cerakote. I've tried and continue to dispel it on my website
http://cerakote.info
If you want pretty colors or camo that sticks better than any other "paint", then Cerakote is your product. It is better than the other kotes, but worlds away from platings.
If I wanted the toughest black finish I could put on my handgun it would be DLC. If I wanted a lighter color it would be NP3.