On 15 Jul 2003 14:00:17 GMT, Ignoramus26572
Don't use _anything_ on a deck that sits on the surface. You will
have to scrape and sand later to refinish. It's just not work it.
Perhaps some type of absorbing oil would be OK, but not a surface
finish like a poly.
The same general advice should be used on houses, but since houses
do not often have horizontal components, and since restaining has to
be done more often than repainting, many folks paint their house. For
some reason no one seems to mind redoing the deck more often, perhaps
it's the relative size issue.