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Do You Have To Prime Before Bondo? [Solved]

NO, never. bondo goes over bare steel only.27 Apr 2018

Tech Tips: The Do’s and Don’ts of Body Filler

Tom Cornelius, 3M application engineer, shares best practices, tips and tricks for mixing and spreading

Filler over primer? The proper way it can be done

Polyester

What’s Right? Body Filler Over Epoxy Primer or Bare Metal?

This video will help