ORIGINAL: Tarasdad
Check the food service grade products available at warehouse stores, restaurant supply houses and some specialty shops. It tends to be higher quality tha the stuff sold in local grocers and retailers. Speaking of which I really need to check it out next time I'm at Sam's Club. Going to be using mostly epoxy and aliphatic resin for my next build but still want to keep the plans as pristine as possible.
I always have a couple of copies of the plans made and use them for construction. One set to cut into more manageable pieces to put on the building board and the other set for reference during the build. The original plans stay folded and out of the way for the entire build.