Can you paint straight over Zinsser? Yes, you can paint straight over Zinsser primer after it dries, as that is its intended purpose to be topcoated with finish paint. Zinsser primers like Bulls Eye 1-2-3 water-based, Cover Stain oil-based, and B-I-N shellac-based are designed to be painted over with latex or oil-based paints. Wait for recommended dry time, typically 1 hour for Bulls Eye 1-2-3 and Cover Stain, 45 minutes for B-I-N, under normal temperature 50 to 90 degrees and moderate humidity, ensuring primer is dry to touch and not tacky. No additional primer needed, you can apply topcoat directly. Lightly sanding with fine grit after primer dries may improve smoothness and adhesion, especially over shellac, and remove any dust. Apply even coat of Zinsser, let dry, then paint with two coats of finish for best coverage. If conditions are cold or humid, allow longer dry time. So yes, painting straight over Zinsser after proper dry time is standard workflow for priming and painting projects.
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