First thing to do is take care of those surface voids. For adhesive, I'm using Loctite PL Premium Advanced Construction Adhesive. Instructions say that it can fill a gap up to 3/8" thick. These surface voids are only about 1/16" deep, so they're not a problem. First, squeeze a goodly amount of the adhesive into the void. I'm using a 3/16" notched trowel to spread the adhesive. The main thing here is to fill the void full of adhesive and level it off flat. The finished patch. I did this on all the voids on the "bad" side of both pieces of plywood.
