I use mine plenty on a daily driven car....with the following rules...and yes, do put it on newspaper when new to absorb excess wax.
1. Do not use it on a hot car surface....it will leave streaks as the wax in the fibers will melt.
2. Do not use it on a car covered with heavy or stuck on dirt. It is only for light dust/pollen.
3. Do not use any pressure whatsoever, just drape the fibers lightly over the paint. What it doesn't remove in this manner cannot be removed except by washing (unless you like marring).
4. If you think the car might be a bit too dusty/dirty for the California Duster......IT IS! Wash it and don't take the chance. Always err on the side of caution.
Using those rules, I've used one successfully for many years without appreciable marring. It helps keep my car clean for longer periods between washes. You don't get everything off with the Duster, but it takes most dust off. I can go 4 or 5 days during dry conditions without a wash with the duster versus 3 or less otherwise.