re: my ultimate assembly bench

I love benches like that....I have one a little smaller, but I call it a franken- bench.  I put a pancake compressor in the bottom, but I see you pipe your air in...that would make for a more continuous flow of air.... Nice job.   What is the roll of paper that you put in there?  I am looking for something I can stain on and not worrying about it seeping through.....