Quote Originally Posted by Argentra View Post
No, the only woods that can be toxic are pine and cedar. Pine boards are alright IF they've been well dried so the oils are not present.

As for sealing, water-based polyurethane or (what I use) Rust Olium Latex-based paints work just fine. The latex base only needs one or two coats, but the poly needs several.
most cheap plywood is in fact fir or pine