What is better than wax paper for covering the plans are:

1. The backing from Monokote.

OR

2. Buy a 9'x12' plastic drop cloth (typically around $.99 ) and cut a piece to cover the plans. The CA doesn't stick to the plastic and the plastic EASILY peels off whatever you are building. I try to use 2 mil or thicker drop cloths, that way they are readily reusable for the next set of plans.