h67st Posted March 30, 2020 Share Posted March 30, 2020 I painted some of my parts last year with Nason epoxy primer (after sandblasting). When it comes time to put the color on, I will scuff the primer...should I put another coat of epoxy on before the color, or should I use regular primer? The guys at Axalta said if I use regular primer, I would have to sand before the color. Quote Link to comment Share on other sites More sharing options...
mattb73lt Posted March 30, 2020 Share Posted March 30, 2020 I've been using this etching primer from NAPA on everything, including the aluminum parts/castings. I'm going to use PPG Concept in "Fleet Red", paint code 75674, as a top coat. This was based on a talk with Matt Pfahl on what he's been using. My past experience has been mostly with Dupont Centari enamel. I need to ask the PPG vendor about an epoxy/primer/sealer I used on my other B model project, as for compatibility. I had very good luck with my last job, and its lasted over 20 years with a lot of outside exposure. I don't do major projects like this often, so I ask a lot of questions leading up to painting and not wanting to have a very expensive screw up come out of it. 1 Quote Link to comment Share on other sites More sharing options...
eddeere Posted March 30, 2020 Share Posted March 30, 2020 I try to apply Nason 421-17 2K Urethane primer within the 72 hr. window of the epoxy then sand after dry . To me the epoxy is harder to sand. Depending what you are going to paint it depends. On body work 2-4 coats of Urethane over epoxy allow to dry good follow with a guide coat then block sand with 320 or 400 grit. On castings, frames,and other parts sand the epoxy then a second coat of epoxy should work although I have never done this . If you use the epoxy as a second coat be sure to not to paint it too soon but stay within the window. For final coats I used Dupont Centari for years with great results seems things were simpler then. The tend now seems to be Base coat / clear coat or 2K urethane . Easy rider did a great job on his truck using Imron. As far as holding up Imron seems to be the best. Most new trucks were done with Imron and maybe still are. I have not used Imron for about 25 years it was easy to use went on like alkyd enamel but expensive. 2 Quote Link to comment Share on other sites More sharing options...
h67st Posted March 31, 2020 Author Share Posted March 31, 2020 Thank you Matt and Ed! 1 Quote Link to comment Share on other sites More sharing options...
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