I just happen to have some Thompson's Water Seal on hand, but am not sure
that this would be the correct product to use. I've seen decks that have
been sealed (not sure what sealer was used) that become very slippery when
wet. That's what makes me question using the Thompson's. I don't want to
create a slippery hazard and wait for an accident to occur.

As to sanding, would 120 grit sandpaper be okay? With regard to applying the
oil or stain, would it be better to brush or spray it on? I've seen where
they use a pump type sprayer to apply the finish followed up with a brush to
thoroughly distribute the product. Any comments?



The water seal likely has waxes in it and any subsequent paint will
fall off. A decent oil paint thinned down for the first coat will
probably last longer. Even though its a wood struture, I would
likely go with Rustoleum. This stuff will penetrate when thined and
give a tough top coat. Spray or brush - spray uses less paint and
gives a smoother finish. Don't spray the dog or kids: inlaws are OK.

Pete