Marc,
I purchased some regular old plastic drop cloth from my area dollar store. Every time I've used wax paper it's just not worked out. Regardless, of which side of the wax paper I used it would always seem to stick to my glued structures.
For a building board, I've been using my bench top for small items. When it comes to fuselage and wing, I'll be breaking out my old hollow core door on my "level" dinning room table. The dinning room table was meant for building and not eating
Regards
Mike