Thank you for your posts. I think I'm going to go with cedar - our treated wood is spruce, and if I plane it down any, I'll be taking the treating off. When I put it back together, I'm going to use alot of silicon on the trim piece, to hopefully keep water out from now on. I'm also using marine grade plywood for the outside wall behind the fiberglass face.
Once I got mine apart, almost all the wood fell out, and everything was wet. This is a poorly put together door - but I guess if you are looking for lite weight - although an aluminum frame could have worked as well.
Thanks for the original post.