Honestly what I would do is use a heat source, hair drier or heat gun to warm up sections at a time and just peel it off. BTW id never use sand paper to get the glue off, that will get clogged up and take forever . Id use gas, its cheap and it works well for dissolving all kinds of glue. I use it on my Dakota all the tome to get tar off the bottoms of the doors. If u plan on keeping the paint under the wrap (which it doest seem like u are) you will need to do a good buff and polish after cuz the gas will take off all of the wax too.
hope it helps,
Rob