First you have to find out how it got wet and fix that. I had a bottom portion on my door get wet and bubble/wrinkle. I was able to 97% match the color and pattern at Windsor Plywood. It was virtually the same board that was in there. Fixed the leak at the moulding part way up the exterior wall and cut and installed the new 1/8" patterned ply on the inside. If I didn't tell anyone I put it in, it would not be noticed.
Steve and Sheri with Archie (and Hiro, R.I.P.)
2000 Winnebago 35U, Ford F53/6.8l V10
F150 Ford and Vintage Aspencade.