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spraying wash primer on cast aluminum with topcoat polyurathane paint. Tips please?
Hello,
I am being to spray on aluminum. I have a good amount of experience spraying. I have repainted quite a few cars but spraying acrylic enamel. Anyways, I have a hvlp devilbiss topcoat and a hvlp devilbiss primer gun. I was told all I need at the paint shop was the wash primer and the polyurathane paint. I have never sprayed polyurathane and I feel this is where I am struggling. I spray the wash primer, just a light coating (still transparent), and then wait approx. 15 min. for it to flash, then spray my topcoat. I seem to be having issues with orange peel, or the paint gathering in the curves of my aluminum. I am unsure if I am spraying my primer wrong, prepping wrong, or my topcoat wrong. For prepping I clean with thinner, then use a prep paint cleaner. The psi I am running is 20. Most aspects of my spraying and prep were given to me by the paint shop, any additional comments would help immensly. Thanks In Advance!
You might try roughing up your surfaces with a 400 grit body paper, then after your first coat dries completely, go over it with fine grade steel wool before you shoot the poly.This gives both applications a surface to adhere to, and as long as you dont over spray, it shoud turn out perfect.
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