In some cases you may even be able to see such black light paint splatter upon close inspection, surface contamination is deposited on cars from a wide variety of sources, 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. Surface contamination that is visible to the naked eye typically comprises organic compounds such as tar, if you can feel rough spots or a gritty texture then unfortunately your paint is affected.
Particularly in the case of tar spots. Tar spots are the most common and irritating organic contaminant, composed of sugars and other waste products that pass undigested through the bodies of aphids, but can be neatly divided into two categories based the typical size of the particles and what they are made of.
Bug splatter is also a common nuisance in the summer months and seemingly welds itself in place on the front end of most vehicles – honeydew and bug splatter. As such contaminants gradually accumulate on bodywork, and are acquired all year round from freshly laid bituminous surface treatments on our roads.