Don is right. Use MDO, I use 1/2", then use a good oil based paint. Also
be sure to paint the edges and inside any holes you may drill for mounting.

"Lew Hodgett" wrote in message
hlink.net...

"Don Marshall"writes:


What's the best wood and paint for outdoor signs exposed fully to the
elements? Best sealer after painting?

I'd use mdo plywood, you are on your own for paint. Try talking to a sign
painter.


--
Lew

S/A: Challenge, The Bullet Proof Boat, (Under Construction in the
Southland)
Visit: http://home.earthlink.net/~lewhodgett for Pictures