Articles: Refinishing a Pressure-Treated Deck
When refinishing wood outdoors, you have two main choices of finish:
sealers, which prevent wood from absorbing water and delay the weathering
process; and stains, which both color and seal the wood.
Semitransparent stains or sealers work best on pressure-treated
lumber. Avoid direct sunlight when you're working. Watch the weather:
don't apply a new finish if rain is expected within 24 hours.
Use an orbital sander to remove any gloss and smooth out any rough
areas on decking boards, railings, or stair treads. Always be sure
to wear a dust mask and eye goggles to protect your eyes when sanding
Thoroughly vacuum the deck, then apply staining sealer to all deck
wood with a pressure sprayer or paint roller. Treat the understructure
first, then exposed surfaces.
Use a paintbrush to smooth out drips and runs. Porous wood may require
a second coat of staining sealer for even coverage.