anyone familiar with PPG products. I primered my 72 blazer with a ppg product i think it was k-200, could have been dp90. that thing is hard as can be. i am resotring a 71 blazer and am looking for that same primer, anyone familiar with any of these. the primer on the 72 turned pinkish after beeing out in the sun a while if that will give anyone clues. thanks, ARQ.