I'm using the GP beadboard and like all thinner plywood, it has
developed a curvature to it after I ripped it. I can fit it against
the wall and appears to flatten out. Note: I had to stop my project
and I could not install the beadboard for a few months thus the
curvature.

My question is - given a good adhesive, can I install this material and
expect it to hold flat? I also haver Zinser(sp?) paint and I want to
eventually paint all sides of the plywood and I wonder if this flexing
of the board would be an issue? I did plan at least to paint the backs
and sides of the ply bead before handing and then paint the front.