I have used zero-rust as opposed to POR 15. It seems to be pretty bullet proof and it doesn't have the nasty stuff that POR 15 does. It comes in brush on, and spray cans. The only thing is, if it is exposed to sunlight you have to put their clear coat over it for UV protection.

A day without laughter is a day wasted- Charlie Chaplin
When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired.
1948 Chevy 2-Ton