Painting walls with Sherwin-Williams Promar 200 Eggshell gives you a smooth, professional finish with just the right balance of sheen and durability. First off, sand and prime the surface lightly if it’s glossy or uneven, then mix your paint real good before starting. Grab a high-density foam roller for that streak-free roll-on, and cut edges sharp using a synthetic brush—works wonders on corners. Roll in overlapping V-shapes, keeping it thin to dodge drips, and let it dry about four hours ‘til