Car wax can leave a noticeable white cloudy stain on a car's black trim. These marks stand out and can detract from the car's appearance. Fortunately, it is simple to fix, and doesn't take much time, effort or money. There are numerous simple and handy solutions that can remove these stains with common household products.
Using a soft, clean, dry cloth, rub isopropyl alcohol over the trim until there are no white residue marks remaining.
Rub peanut butter across the trim to remove residual wax reside. The oils in peanuts dissolve car wax. Wipe away any excess peanut butter with a clean, dry cloth.
Wipe vinegar over the white stains until all the white waxy residue is gone.
Dampen a Mr. Clean Magic Eraser and wipe it across the trim. Use caution with the Mr. Clean Magic Eraser, if too much pressure is applied and it comes in contact with the car's paint, it can damage the paint.
Apply white toothpaste to an old toothbrush and scrub the trim in a circular motion. Rinse the toothpaste away before it dries.
Scrub the trim with dish soap (Dawn is preferred) and an old toothbrush. Rinse the area well with clean water.
Commercial products such as Meguiar's #39 and Goo Gone are also effective.
Test each method on an inconspicuous area first, to make sure it does not damage the trim or paintwork.