I've never been a big modge podge fan when it comes to crafts but it does seem to seal the paper well when you use it to adhere and also as a finishing coat. I bought an unfinished doll house bookcase for my dd a few months ago and used scrapbook paper and modge podge to "wall paper" the walls and floors of the cubbies in the bookcase. Aside from the few bubbles and bumps from the modge podge it turned out great! It is definitely sealed well and has stood up to her playing with her barbies and wooden furniture in it. The only other thing I could think of that would give you a REALLY tough finish would be some sort of epoxy, I'm not sure you would need that though, I'm thinking modge podge might be fine for sealing the top. If you are using an ink jet to print the papers, you would need to seal them first before using modge podge though - you can get spray sealers at the craft store.

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