| Occasionally, in this very group, people have mentioned a sheet
| goods material that is used to make outdoor signs. IIRC, is has a
| smooth, bonded material (phenolic?) on the to be painted side. I'd
| seriously consider using it, don't recall the name. If you don't
| mind the rustic surface, T-111 could be used too.
You're on the ball! I think you're talking about MDO or HDO - and
although I've used the stuff, it didn't even occur to me that it would
be about perfect for this application. With the edges sealed it should
last a _very_ long time.
DeSoto, Iowa USA