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|634 days ago||
My sprayed polyurethane finish looks bad! - 10 replies
I am using Minwax Helmsman Spar Urethane thinned with 30% mineral spirits and spraying it on cedar with an air detail sprayer. When it dries it has speckles in it and is rough almost like it has sand in it. We are blowing everything off and using tack cloth on it and sanding with 220 before spraying and sanding with 320 after the 3rd coat and be...