I'm thinking about making a proofing box for bread dough. I will need high humidity, and perhaps even a heating element to keep water vaporized. I'm wondering how something like shop-grade birch plywood would fare under those conditions, with or without a finish.
I may be able to finish the inside with polyurethane, since the food won't come into contact with it, but I don't want to wait a month to have the fumes finally cure out if I can find a better solution.
My other option is a wood frame and plexiglass body, but that won't look nearly as nice. Are there any good options for humidity resistance for an application like this? Solid oak perhaps?