Decontaminating Paint

Over time, it is not unusual for automotive paint finishes to become slightly rough to the touch. Such roughness is caused by the gradual accumulation of surface contaminants that are too firmly bonded to be removed by normal washing alone. To determine whether your paint has acquired firmly bonded surface contaminants you should wash and rinse your car thoroughly and then run your fingertips over the wet panels. Clean paint should feel perfectly smooth (if your fingertips aren't particularly sensitive you can magnify your sense of touch by putting your hand inside a thin cellophane wrapper first). If you can feel rough spots or a gritty texture then unfortunately your paint is affected. Also, in some cases you may even be able to see such contamination upon close inspection, particularly in the case of tar spots. Surface contamination is deposited on cars from a wide variety of sources, but can be neatly divided into two categories based the typical size of the particles and what they are made of.