frame paint opinions

[jimmq]

I have a 72K20 with moderate to heavy rust on the frame. All of the heavy rust is behind the cab.. Im going to pull the bed to repair the wood so I would like to take care of this problem while I can. The truck is parked inside unless Im driving it or plowing snow in my driveway. This is not a show piece, I use it as a truck. I have used POR in the past for truck bodies but I am seeing what other products others have used.