just go to any shipping store or office supply store and buy a roll of their brown cover paper. its really handy stuff.
http://www.veripack.com//Product/dep...ft+Paper+Rolls
thats what i use sometimes...i get it from work. or i use plastic garbage bags. Anything works as long as it:
A. covers up everything without leaks
B. Doesn't soak through the little paint that gets on it