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Old 04-08-2010, 07:12 PM
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deadbodyman deadbodyman is offline
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Today ,after letting my old hood sit for another week,I did all of the same tests to the other(untreated) side plus redid the bondo blob again.
I added another test used by the military that another member told me about....


page 54 on this link is instructions for how to do a cross hatch cut adhesion test...

https://www.oskgpsc.net/otc/paintspec.pdf

(a shortcut direct to the page is back space/blank out the pdf page number window at the top and type in "54" and hit enter on your computer)

...This test involved scratching lines through the primer all the way down to the metal,making nine squares.
I did this to both sides of the hood...Remember,one side was treated with Ospho and the other side was just sanded with 80gt da.Then both sides were cleaned with wax & grease remover and primed with epoxy.
I was told that masking tape would work fine for this test but I really wanted to put this to the test so I used duct tape again because it sticks way better than masking tape.Heres the pics of how I did it.
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