Hate to be the Devil's Advocate here but leaving it in primer can be detrimental. Unless you use an epoxy primer, any other type of primer will actually absorb moisture and promote rust. Even if you don't see it you can end up locking it in with color later.
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--==RPM Resto & Custom==--
1989 IROC-Z Media Coverage:
Chevy High Performance - Readers Rides 4/03
GM High Tech Performance - Tech Article 3/06
Chevy Rumble - Tech & Feature Articles November 2006
Auto Restorer Magazine - Feature Article 5/11
SkinAndSteel.com
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