[targa80]

I am in the same boat as you are Shuie. My tub is down to the bare metal and I am in the process of cleaning off all the little bits of paint body shultz and primer that was left after the inital paint stripping. I also have some flash surface rust to deal with. I will be using the Por-15 but first I will wash the entire tub with a marine clean dry it and the metal etch Metal ready. Metal ready and marine clean are Por-15 products. The metal ready is a Phosporus(spelling?) acid That converts rust and lays a protective coating. I will shoot two coats of Por-15. 45 minutes after the second coat I can spray a light layer of the primer I am going to use. The tech's at Por -15 said this will allow the primer and Por-15 to chemically bond together. Then I can prime as much as I want before painting. They do not recommend using Por-15 over anthing except bare metal treated with metal ready etching solution. You can certainly do sections of the car if you want to. I thought about it but decided to wait until the whole tub is ready.