Detail King's comments on gas blowers matches the general concerns of blower users . . . a gas blower has a two stroke engine. Two-strokes have oil added to the gas mixture (or injected into the combustion chamber). The concern is that "oil fumes" may get blow onto the car. He is also right, when you are using an electric blower, it must be a high powered model.
Re "sandblasting" the paint, I have not encounted this problem. Obviously, if there was a lot of dust in the air, one WOULD end up sandblasting the paint. But, we never detail our cars in dusty conditions, anyway (what's the point).
The air exiting a good, top level electric blower is going around 200 mph. But, that is measured right at the nozzle exit. The air slows a lot after it exits. I think its going little more than the equivalent of driving at high speed.
I think the situation is reverse. Rather than the blower causing damage, using the blower eliminates one instance of the need to rub the paint with a towel, which, in the long run, I think may be beneficial. But, to do a cross-check, has anyone experienced any sandblasting damage from using a blower?
As I have said before, using a blower has the added benefit of making you look wildly eccentric. How can you claim to be a true detailing fanatic without being seen blow drying your car?
[Edited by darbh on 08-06-2001 at 10:48 PM]