Yes its a one time application, its a paint not the oil wax type stuff. We wire brushed the frame to get any lose rust or paint off, painted at least two coats of the master series then sprayed with a 2k primer. We actually used the eastwood 2k primer. Eastwood as a rust encapsulator product which is similar but did not work nearly as well.
Eastwood also has the anti rust spray in spray cans or regular cans. That is a wax oil mixture and they have and have it where it dries black. That is more a preventer, dries like a real real hard wax, but nothing will stick on top of that stuff. Great for under body applications periodically when you to not want to wire brush and paint. We did take the spray gun with long tube after we painted the frames and sprayed the inside of the frames with that stuff where we could not paint, especially the boxed sections.
For body panels wire brushed scuffed and painted with the master series 2 coats with foam rollers then y2k primer 2 coats then auto paint. The master series is a real pain to sand out brush marks, it dries like a hard aluminum. We were dealing with some serious rusted vehicles. My sons bronco the fenders looked like swiss cheese after the wire brush, probably more metal gone then left. Limited budget for a college kid so we put on the master series 2 coats then he put fiber glass mat on the inside, body putty on the out side over the master series. For what the fenders where they are now solid and several years of salt spray no rust bubbles at all. Once he gets a real job he will buy replacement fenders but for now not bad for some work and only a little money. But probably everyone else would have pitched those rusted out fenders. The fact it is not rusting under the master series is extremely impressive and the stuff we put on top of it bonded so well. That is where it is best, body putty and fiber glass bonds to it real well, and it stops the rust under those products. Fiber glass or body putty over rust allows the rust to run under those products and really destroy it. This works great for preventing that with adhesion of those products.
I am not some sales guy just very impressed and hope to help people know some options, you can go through my build thread in my signature of my fj40, it was done at our old house but after we painted it we moved it to the beach. everything was coated with this product before painting.
