Quote Originally Posted by HOTRODPAINT
I've been using a non-rinse metal prep from R-M for the last 10-15 years, without a failure. Just wipe and towel dry 30 minutes before primer. I always etch bare metal, even if I can't see rust. Why take the chance when you can prevent any possible problem in 30 minutes time.

Just don't use metal prep if you are using self-etching primer.
I have been using epoxy primer first,followed by high build urethane primer.Would an etching primer be best to use on the bare metal,,,or does it matter? Sometimes I strip a panel of all paint,repair the rust outs,and it may sit several days before getting primed. I do hit it again with 180 grit on DA but would the etch primer be better to use than epoxy since it'll be garaged til top-coated,,,?