I've used painters tape, masking tape(gasp!), post it notes, you name it. As long as the finish on the machine is good, or you don't leave the tape on the machine then store it in a hot attic, you should be fine. I use TR3 as part of the cleaning process and I haven't had a problem (yet) with tape harming any of my machines. The only machine I have with tape damage came to me that way. My FW has baked on old medical tape on it and I've not found anything that will get the adhesive off without hurting the machine. The top of the tape flaked off but the bottom adhesive part seems impervious to the usual methods of removal.
Cari