The 1/4" luan I bought for my TTT project was OK quality for it's intended purposes, but the stuff cannot handle water. (Delaminates). This is not a problem where I used it (covered on outside with metal and industrial epoxy paint), but I'd like to use some to build my outer door facing.
I would not use any leftover material that I have left from the batch I bought. I do recall buying some luan 15 years ago for an underlay for my kitchen linoleum.
One piece of that scrap layed in the rain for weeks. Used it for place to set drippy paint buckets, a morter board, then the roof of rabbit hutch. It never delammed or warped.
Anyone here had some "good" luan and do you know what brand and who sells it? Thanks.