PPG DPLF epoxy is crap that is the best thing you can say about it. In a thread on the build of my 34 I showed how DPLF even after sitting on a hood in my garage for six months wiped right off with a lacquer thinner soaked rag. I was told that I didnt mix it right or didnt apply it right., which was pure baloney. I removed all the PPG epoxy primer from my hood and replaced it with SPI which will not rub off with a lacquer thinner soaked rag. PPG paint is first rate but they really need to do some work on their epoxy primer because it is far from durable.