As in birdhouse bird safe.
I’ve got a small hobby market potential for making turned birdhouses. Real ones, not the decorative collectable kind. Since most birding publications recommend cleaning them out annually, I’m wondering if it would be benefical, housekeeping wise, to finish the insides with something to seal the wood. I’m thinking a penetrating oil, tung or log oil would be appropriate but not sure if this is a healthy thing for birds. It’s a pretty tight environment inside a birdhouse! Or once the oil has cured does it no longer present a problem with toxic outgassing? Or just forget the finish altogether?
From Beautiful Skagit Co. Wa.