It is not uncommon for me to wash a vehicle that is very dirty, skip the drying process and start over and wash it again. It might surprise you the amount of dirt you have missed.
Besides, it really convinces the neighbors you are totally crazy.
As far as wearing the paint off, I have been known to wash a vehicle three times a week for years.
A daily driver that spent most of its life outdoors looked great after 14 years and 168,000 miles.
As a side note, it was one of those cheap domestic brands, (Chevrolet), and I had to spend about $1200 dollars on the piece of junk for repairs. That is a bit of sarcasm folks. We do presently have both import and domestic vehicles and the reliability of both seems to be excellent and tied almost directly to the maintenance given.
Almost sounds like taking care of the appearance items, doesn't it?