POR is only good on stuff that is heavily rusted/scaled. otherwise it's useless. if it doesn't have a rusty surface to stick to it will just peel off in sheets.
for something durable, i like using herculiner bed liner. much better and more durable than the spray on rubberized undercoating crap.
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1987 camaro - 350/t-5, various suspension goodies.
1969 camaro - supercharged 350/t-5, pro touring project
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