i can peel one in a day or so with my blasting rig. no damage to sheet metal. i have a media for paint, one for rust . i can blast fiberglass also. but i run my rig at 30-35 lbs of air . depending on the car i still use the heat gun / razor blade on many . peel them down to primer then clean up in the blast room .
dave, i can tell how old i am now every time i pick up that 1 1/4 hose . damn thing will wear you out .