This looks really good! (I really like the Chip & Dale cover - love those guys!)
In case you run into this again, are doing another project, or if anyone else out there want's something that won't take quite as long to do, you should try
EnviroTex Lite®. You can get it at Michaels, but the Jo-Ann's up here doesn't carry it.
It's a little more expensive than Modge Podge, but if you figure you just put on like 5 coats of Modge Podge and 5 of sealer, then it is definately worth it.
This stuff is what a lot of bars use - it is seriously industrial strength. The Michaels here has a display of a couple projects that have had this done. It is thick and
durable! A friend of mine did this to a couple chipboard tiles with her kid's pictures on them (ages 4 & 6). They use them to play tic-tac-toe and have thrown them around and stepped on them in the car.
It won't bubble the paper because it is so thick and heavy, but sometimes you'll see bubbles in the actual epoxy. Just take a straw and blow OUT to move the bubbles to the edges and then you can sand them away once dry. (I cap "OUT" because it is so strong, you don't want to inhale it - just like the sealer spray stuff.)
Sorry I didn't see this sooner to offer help, but it came out really cute!