darn got sut short on last post....por15 doesn't require a surface to be completely clean. So how clean does the surface have to be to apply ZR to it? Thanks for your inputs

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37 chevy 1/2 ton


37 Chevy 1/2 Ton
86 Chevy Blazer
98 Drudge 24 valve Cummins
One worn out Timberjack