I removed vinyl stickers from my four-wheeler with a hair dryer. Worked like a charm. The stickers were brittle and broke off in little chunks without it. They came off in one big piece with the hair dryer. The surface was plastic, but should work just the same on your pump, as long as they didn't clear coat over the stickers.
As far as damaging the paint is concerned that's hit or miss. Only one way to find out. You can always cover it back up with a new sticker or PP.
Last edited by Speedracer; Tue Feb 09 2016 06:52 PM.