After the initial priming, we just used rattle cans to re-prime the spots we had sanded. There was an incompatibility between the different primers which was obvious from some wrinkling we got. That sent us into a tizzy, because we thought we'd have to strip the truck back to bare metal. Fortunately by this time we had enlisted the help of Reno Auto Body. They had this Spies-Hecker sealer that was designed especially to keep any issues with dissimilar paints at bay.