how do car washes prevent spots
Paint & Trim Cleaning. To help prevent water spots or the soap from drying on the car, wash in a cool, shaded spot. If that is not possible, do the steps below in sections at a time. 1  Fill 2 buckets with water-one with soapy water, one with clean water.2  Rinse as much loose dirt off the car as possible with water.aint & Trim Cleaning. To help prevent water spots or the soap from drying on the car, wash in a cool, shaded spot. If that is not possible, do the steps below in sections at a time. 1  Fill 2 buckets with water-one with soapy water, one with clean water.