So, I'm in my local paint shop on Saturday purchasing some epoxy primer/sealer to prime my bare metal blasted parts. I wanted to also purchase a primer to apply over filler, to use when block sanding panels. Paint shop asked me if I wanted polyester primer or urethane primer. Embarrassed, I asked them why I'd choose one over another. She indicated that if I'm going to wet sand, use urethane primer.
Decisions, decisions. Why would I purchase polyester vs urethane primer? Wet sanding can't be the only reason.
Thanks in advance for any info on this decision.