Undercoating

I agree with SPOKANEZ. It's all in the preparation. I did some panels on th e72 that I am working on with abrasive discs and a ROLOC tool. The discs work reasonably well but not able to get to all the pits and crevixes. I finally took my friends advice and go a CLARKE 20 Gallon sandblasting pot and the results are amazing. The sand hits it all and turns the metal with. After that I seal with RUSTOLEUM rust reformer. SKS black works pretty good for a final coat but I think I am going to put a layer of POR15 between the SKS and the reformer. The sand does a much better job than the discs but stripping and re-sealing can be like that. But when i close this car up in the future I won't have any issues ever again. Will post pics as soon as I can. I shot the gas tank and it looked the way it did before it was installed in Yokohama many years ago.