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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
Posts: 5,235
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You have a choice - epoxy primer or a metal etching primer over bare metal. If you sprayed a high build sanding primer like feather fill directly over bare metal, you will not have a great bond and the paint could pull away or chip to bare metal easily. Paint layers require either a chemical or mechanical bond to adhere properly. High build primer will not form either very well with bare metal.
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