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.
1. 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 treated wood.
2. Thoroughly vacuum the
deck, then apply staining sealer to all deck wood with
a pressure sprayer or paint roller. Treat the under
structure first, then exposed surfaces.
3. Use a paintbrush to
smooth out drips and runs. Porous wood may require a
second coat of staining sealer for even coverage.