I will try to find my hot knife and post a picture. It works for all of the caulks, glues, and putty I have come across. It even helps with removing...
Wonderful. I can't make out who the maker is but the sign above it signifies that the smith was apart of the Tokyo Chisel Group. It's likely white #1...
Vespel is definitely not a thermoplastic, and you definitely do not want to cut it with heat. I'd suspect the same with PEEK but I haven't tried that...