Painting the 71 valiant

Well been fixing dents, replacing rotted quarter panels, blocking out the body on my sons 71 valiant. Going back to the factory color it's been wearing, Sno-white. Been using defleet essential for the epoxy primer in white over a red oxide primer that we use for a base primer over repair work. Probably used only a cup of high body filler on the whole car. Single stage topcoat limco topcoat going on next. I'll add some pics of the progress. Anyone used defleet essential or kimco? If so how are they longterm for durability?