Paint prep

[thtrev2001]

Just recently purchased this 1994 M998. The entire truck looks great but all 4 doors have paint peeling off of them. I purchased spray cans of the appropriate colors from rapco but am concerned about prepping the doors. Do I need to remove all the paint from the doors? What about a primer, should I prepare the substrate with a sealer of some sort? what caused this kind of peeling to begin with? This was purchased straight from the DoD, no previous owner messed with it.

 

[tobyS]

That is modern day camo.... to disappear at a fire scene.

Are they fiberglass? Can you hand scrape the old, sand and have solid materials to primer and paint?