Though I usually tend to shy away from "disposables" when they aren't really necessary:
I learned a great, though somewhat counter-intuitive, way to address the question of "what's the best bench top surface?" - and that is: poster-board. Yep, just plain old heavyweight paper or cardstock. Cut it to size and tape it down on the edges. It's a surprisingly tough surface to work on, you can writes notes and measurements as you are working right on it, you don't have to worry about paint or glue spills on it, the white surface is easy to see small bits on, you can use a very plain (and inexpensive) subsurface underneath it, etc. When it gets too grungy, simply peel it off and replace it with a new layer (sometimes you can simply turn it over and use the other side). It actually lasts longer than you might think. Of course some folks are very hard on there bench-top surface and might have to replace it "too often", but if that's the case you probably don't want something really nice anyway.
Poster board is cheap and easy to find. Give it a try.
s6