For reflective tape I have used a torch. The adhesive loosens, then the tape can bubble at a temp well below the temp of paint damage. A piece of wood or a cooking spatula will help aid scrape off the the tape.

I had a Bike that was completely covered with tape. With the torch it all came off really fast, without the heat really slow. The original paint came through unharmed. I sold that bike, the buyer was a really neat guy, he's bough a few things from me.