I purchased the erasers but ended up using careful application of heat with a heat gun. The result was great as nearly all of the residue came off with the tape. I just needed to wipe the flaps down with a little MEK to finish up the process.
There are several places to use UHMW tape on a tip up canopy. The plans want a strip under the front lip of the canopy where it closes down on the subpanel. I also put a small piece on the canopy frame under the top latch to prevent scratching of the paint where you turn the handle. I also put a strip of the tape on the cross members where the seat backs rest. Lots of uses!