Cutting Back Zinc-Rich Primers Before Topcoat (Grit Limits)
Cutting Back Zinc-Rich Primers Before Topcoat (Grit Limits)Zinc-rich primers aren’t ordinary primers. Packed with metallic zinc, they’re dense, tough, and easy to burnish if you sand too fine—or to scar if you go too coarse. “Cutting back” before topcoat is...