It's simply because the first coat protects, so that the second coat
will never penetrate. It just sits on top like the water is supposed
to do. The only good that a second coat will do is make it slippery.
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.
What's all this talk about a vanishing house deck. How in the world can a
deck vanish? It's so big and heavy, it can't even hide except at night and
even then a full moon would not allow it to vanish completely. Perhaps
creatures from outer space could make a deck vanish but they could make
almost anything vanish, including the house. I don't think it is possible
to make a deck van.......
Try the Cabot's Decking Stain products; they work very well in my
experience and are top rated by a well-known consumer magazine. I
just did my 22x24 PT deck with 2.5 gallons worth of the stuff and
expect to not do it again for 2 years or more.
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