I am a hot rod shop out of GA and have used PPG for over 30 years with no real problems till lately. The DP epoxy line that we have all used forever is failing me, before the LF or lead free label hit the can it would stick to plate glass around probably around 1998 after that it had to have more cure time before top coat which as of late is at least 24 hrs. But now even at that will pull loose from sandblasted metal, bondo, plastics and sanded metal. I'm even seeing cars at shows where this seems to be a problem any one else experience this as well ???