Finishing raw plywood edges with iron-on wood tape
Select a roll made of the same wood as the plywood’s good side. Make sure that the plywood edge is square, smooth, and clean. Wipe it with a tack cloth.
Unroll enough tape to cover the edge’s entire length. Using an iron on a warm, nonsteam setting, tack the tape to the edge by pressing at 6-inch intervals. Smooth and align the tape as you go. Finish bonding it by sliding the iron slowly along its full length.
After 5 minutes, carefully remove any overhanging tape with medium fine (120) sandpaper. Miter corners where tapes meet, using a sharp craft knife. Touch up any unglued spots with the iron. Lightly sand the seams with fine (220) paper.