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Old 05-08-2012, 08:31 PM
Imagery Imagery is offline
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Sealer with to much dry spray

I just finished spraying sealer (HOK KO-Seal II) on all the separate body pieces for my Porsche 944 project in my temporary garage booth and everything felt rough with over spray. I used HOK medium reducer (75-85 deg) and my actual temperature in the booth was 84 deg so perhaps I should have used the next slower (85-95 deg) but I'm not sure if that would have helped. I used the correct mixture 4:1:1 mixture and a 1.3 needle on the HVLP, 29 psi at the gun and 10 psi at the tip. I had a total of 11 pieces placed all orotund the booth so it was hard to manage over spray direction and the air flow probably is not what it should be because the overspray just hung around longer than I would have liked. I waited a little over an hour to dry and was ready to shoot base coat (BC13.Q01 Meteor Maroon II) but thought that I should lightly tack everything first which didn't really help much. I began with the rocker panels and I could see everywhere that I used the tack rag. I did those and the sun roof and the same thing on the sun roof. I went ahead and did three coats but knew I was going to have to sand it back off but wanted to see what happened. It still showed up underneath where I tacked ( I did not apply pressure on the tack rag, just under its own weight) so I knew I messed up somewhere along the way. Should I sand those pieces down back to the sealer until smooth and then re seal and on the rest of the pieces, sand the sealer until smooth and do another coat of sealer? I just need to figure out what went wrong so it doesn't happen again.
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