No. Washing frequently protects against the damaging effects of weather and harmful UV rays.
We recommend washing frequently. A good rule of thumb is weekly, but weather conditions will determine how often to wash. In New Mexico, we suggest a polish wax be applied twice annually and our on-line clear coat wax or Rain-X Complete Surface Protectant be applied monthly.
Clear coat is the outer layer of your paint which gives paint its shine and protects the base coat from damage.