Many years ago W.E.S.T. Systems published an article on cleaning/prepping epoxy. They tested all kinds of different solvents for prepping between layers of glass. The results were surprising, plain water was the best in every test. So we did our own testing and found the same result. Turns out most solvents (especially acetone) are not very clean. They offered a way of testing the solvent - get a perfectly clean rag, saturate it with the solvent of choice and then wipe it on a mirror. If it's clean there will be nothing. If it's dirty it will leave streaks. Quite an eye opener.
In our tests with epoxy, the absolute best was to wet sand (60 or 80 grit) and let dry naturally.
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03-09-2013, 10:21 AM
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