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2k Urethane Primer, Epoxy Primer or Polyester Filler Primer for Your Classic Build?
THE STORY
Hey Tony,
I enjoyed today’s live stream. Unfortunately, I got called away when you were answering my question about polyester primer vs urethane primer. My ’61 Ranchero (see photos) was initially sprayed with a primer by Napa Auto Parts and blocked down to 140-grit paper.
The car sat for about a year in that state. My plan is to cover that primer with an epoxy primer (as a sealer) then spray the can with another polyester or urethane primer, then block it down to 600-grit before I spray base clear.
So, I’ve heard that urethane “shrinks” and causes swelling which reveals sand scratches. Please give me your input on this.
Photos of the 1961 Ranchero Custom Paint Project
Feather Fill G2 Polyester Filler Primer
This is great for classic builds or major body filler work that needs a thick filler foundation to fill and get a straight body.
Can you go without it?
Yes, you can if you prep and do bodywork close enough to where you only need a basic 2k filler primer/sealer. Advantage, Speedocote, PPG.
Feather Fill is meant to spray over a lot of body filler work that is cut and shaped with 60-80 grit.
Can you spray over an epoxy primer? YES but the epoxy should be cured and dry at least 10 days in hot weather or up to three weeks if cool. Same with a 2k filler/sealer primer.
Pros – Very thick and can fill over 60 grit sand scratches, even up to 40-grit although I would sand until at least 80-grit if possible.
Cons – Very thick and will dry VERY hard. Not easy to sand and will clog sandpaper fast. Recommended cutting with a 150-180-grit paper. Finish with 400 wet or dry if you plan to paint directly over it.
Pricing: $70 – $80 a gallon. Depends on where you purchase from.
*Must use at least a 2.0 tip on your spray gun to spray out this thick type filler.
Recommended Spray Guns: ATOM X Series Spray Guns
GunBudd® Universal Spray Gun Ultra Lighting System
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P.S. Did you enjoy the topic on 2k Urethane Primer, Epoxy Primer or Polyester Filler Primers? Check out some of the links below for more auto body resources.
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Great video
Thanks for the post.Really thank you! Will read on… Marquis Blare
Thanks Marquis! Grab your free 85-Page Auto Body And Paint Manual if you still haven’t: https://learnautobodyandpaint.com/free-autobody-manual
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