Sun, moisture, and weather damage the finish on a wood entry door. A good paint job might last for a decade, but a clear finish can degrade in just a couple of years. Check the door periodically and repair or refinish as necessary.

Time — 30 minutes for basic cleaning and touch up
Difficulty — Easy
Expertise — None
Frequency — Twice a year
Where — All US
Steps
- Wash the door in spring and fall with a mild detergent.
- Touch up scratches or chips in the finish right away, to keep the finish intact on the four edges, as well as the front and back of the door.
- If the finish is dull, crazed or crackled, or the wood grain is raised, repaint or refinish the door. Remove the hardware, sand the door smooth with 180-grit sandpaper and wipe off the sanding dust with a tack cloth. You don't need to sand the entire door to bare wood; just sand enough to give the new finish some tooth.
- On a painted door, apply exterior oil-base primer to any bare wood. Finish with two coats of oil-base or latex-base exterior paint. Coat the both sides and all four edges completely, following the paint manufacturer's instructions.
- On a clear-finished door, apply two coats of clear exterior finish with an ultraviolet inhibitor. Coat the inside, outside and four edges completely, following the manufacturer’s instructions.
- Dark streaks extending up from the bottom of the door or door panel mean that water is getting into the door. Sand and repaint, or refinish the door.



