Paint varnished doors
If you have ugly stained and varnished doors and trim and you'd like to paint the whole works, here's the best way to get a good-looking result.
Start by sanding the surface with a random-orbital sander and 150-grit paper. Use a fine-grit sanding sponge to get into crevices. Don't try to sand off all the varnish. The goal is to remove any flaky varnish and to roughen the surface for a good primer bond. Wipe off the dust with a brush.
Then roll on a coat of BIN or KILZ (available at home centers for about $8 per quart). Have the home center or paint store tint the primer to a grayish color to help cover the underlying varnish. It also helps the finish paint cover with fewer coats. Apply the primer with a 6-in. high-density foam roller ($5 to $8 at home centers) to avoid brush marks.
If you want to keep the wood grain from showing through the paint, trowel a thin layer of spackling compound over the entire surface (Ready Patch is one brand, available at home centers for $6 for 1 qt.; zinsser.com).Use a 4- or 6-in. putty knife to work the compound into the wood grain pores and to fill holes. Wait for the compound to dry, then hand-sand with 220-grit sandpaper. Roll on a second coat of primer. Let it dry overnight, sand again with 220-grit sandpaper, then use a new foam roller to apply the paint.
If your home was built before 1979, check the paint for lead before you scrape or sand. For more information, go to hud.gov/offices/lead.