Yes sometimes the wax paper sticks to the odd glue joint as you said it easily sands off. I find it sticks more as of late I think they are using less wax in the wax paper. I may try something like a light layer of car wax on the wax paper. Pin it down apply the wax and buff it off. I have tried the plastic wraps and I didn't like them though I know many who use it. If your getting it really stuck to the glue joints you may be using to much glue. I like to lightly glue all the joints then go over them after the structure is removed from the table. This way I get the bottom as well.

Dennis