thats not true mate,
well my jet wash at work gets to like 500 degrees, and if you get it too hot or leave it on the same spot for a certain amount of time it does burn the paint off.
aslong as you do it on a cold setting and dont stay in the same place for a certain amount of time it should be ok
maybe stupid but easily done,
just warning because not everybody has "common sense" and are obvious genious's.
i would rather put my point across and not let anybody get stung