I am using ppg prods. on a 32 5 window ford. we hade the body blasted and then metalpreped then dp90 and then body work then dp90 and then i put on ncp271 thats where the problem lies after about 3 days of curring i start sanding with 320 and in some of the corners it was cracking an d kind of pealing up but just on the bodylines and inside corners so i freak out call my paint rep he comes out and siad i did not get enof coverage with dp90 so the ncp was getting under it hinse making cracks, then he tells me that i didn't even need the dp90 cause the ncp is a primer sealer so i sand out all the dp90 and just spray ncp and it cracks again. plus other little problems like major shrinkage after color sanding witch sucks cause no one wants to sand something more than once have you ever had any problems with ncp271
