I just washed and removed all the black streaks from the side of the MH. I did not strip the remaining finish but just cleaned the the bad areas with Bar Keepers Friend. When I applied the first new coat it blended in where I had aggressively removed the black steaks. I gave it 2 more coats and it looks very shiny again. The worst areas were the front due to bug removal and the top above the windshield where it gets the most direct sun. In those areas I put 4 coats on. I think if you get it too thick it is more app to flake off.