I'm glad you adhered your glass to the wood and then appied the polyuera. I work as a NACE II coating inspector for a a polyurea company, and on a recent project they had bubbles coming through the product and opted to attempt a repair with off the shelf silicon. Lets just say that there was no adhesion between cured polyurea and the silicon.
As for adhesion to glass I'm pretty sure you will have an adequate seal, since you did rough up the surface prior to application. We have never sprayed glass so I really have no data on it, but I don't see why you wouldn't get a decent bond. Its not like when they sprayed polyethylene and wondered why it just peeled right off in one big piece.
I am watching your thread as I have considered doing a plywood setup with the polyuerea as application is so easy with a plural system, though do to the silicon window issue I opted a 100 % solids epoxy for my first test tank.
Keep us updated
Sadly, my tank is still leaking, presumably from around the edges of the coating, on the glass. I tried sealing around the edges of the polyurea with the sealants mentioned earlier with no success, and also just had it resprayed and it's still leaking.
Any suggestions?
I'm ready to start over and use pond liner or something with a higher success rate, frustrated....