As you drive, or leave your car outside and uncovered, your car's paint collects dirt, grime, bird droppings, bug splats, water deposits, tar, oil and other substances. These substances contaminate your paint, reducing its brilliance and smooth feel. If left alone, paint contaminants will cause premature oxidation or may etch the paint.
Foreign materials such as dirt, dust or oil that can be detected in the cured powder film, pre-treatment chemicals or air supply.
substances contained in in-use metal removal fluids that are not part of the original fluid formulation. These can include abrasive particles, tramp oils, cleaners, dirt, metal particles, dissolved metals, hard water salts, bacteria, fungi, and microbiological byproducts.