Coating inside of the cab - what did you use

[focusedontheprize]

I realized I have not updated my build thread in a couple months so I will do that this week (currently at work).

Right now, I have the cab and bed mounted on the frame. So I started cleaning out the interior (removing moldings, gauges, fuel tank, etc) and really looked at the floor. The floors are 98% solid (only holes I have really are the transmission cover which i will replace), but I do not want to "finish" the cab. I wanted to keep the rustic look to it, but prevent any further rust.

So here is my dilemma:

I was thinking of coating the whole inside (from below the rear window to up the firewall) with POR15. I think it will hold and preserve the cab much better than anything else and also means I don't have to take it down to bare metal. The issue is the cab is on the frame and the frame is painted. If I use the Metal Prep I have to spray the inside of the cab out which is a pain and I am going to have to bag everything and try to keep the water down.

I am looking to see how you guys finished off your cabs (especially the rat rod guys). I just didn't think epoxy was the best move.