I had some problems with the Hide Glue during my first install of veneer on plywood trued with bondo.
The maple veneer is smooth, flat, and seriously stuck to the Bondo-coated plywood, without so much as a hint of an uneven surface. I veneered both sides of the ply at the same time, rolling the Hide Glue on using a foam roller. I then used one of my wife's heavy plastic clothes storage bags, the type you suck the air out and compress the contents using a vacuum, to put pressure on the veneer while the glue dried. I think she bought it at Walmart, but I'm not sure and if I ask her, she will know I stole her bag. I used my shop vac to deflate the bag, resulting in some serious pressure. I then left the piece to dry overnight. The air valve on the bag is a one-way type, so you only need to suck the air out of it and once it is as tight as it will ever get, you can remove the vacuum hose without any ill effects to the pressure.
I opened it up this morning and was truly pleased with the results. It is nice to win one once in a while.