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Old 02-10-2022, 06:52 PM   #14
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Join Date: Aug 2019
Location: usa
Posts: 176
Re: Help with sanding after media blasting.

I would like to bring a few things to your attention. Zinc phosphate epoxy Automotive primer it's not The best defense against rust creap and corrosion . Automotive zinc epoxies after 700 hours of salt fog testing and then there will be rust creepage, Zinc Rich Industrial epoxy 3000 TO 5000 hours. Aluminum pigmented moisture cured urethane primers go 8000 of hours without any creepage Each epoxy manufacturer recommends different surface preps for bare metal some using acid etch some use wax and grease remover check the data sheet. Epoxy primer is not sunlight stable when it's exposed to heat and direct sunlight for any length of time it will continue to react that can cause a problem in the finish coat. All this information is available on the net
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