Causes and Solutions of Chemical Etching or Staining


www.TintingTool.com / 2018-08-11 11:06

Known as acid rain, spotting or discoloration, this kind of problem is characterized by irregularly shaped etching, discoloration or pitting that appears on your car’s paint film.

Cause:
When damaging natural contaminants like tree sap, acid raid, road tar and bird droppings, among others, stick to the surface of your car for a long period of time, a chemical change happens and will cause staining or chemical etching.

Repair:
You can mend this kind of blemish by washing your car with hot water and soap, rinsing it and then drying it thoroughly. You can also do some solvent cleaning using the proper surface cleaner. You can also wash your car using a solution of baking soda and water before rinsing it well. The appropriate mixture for this solution is one tablespoon of baking soda dissolved in every quart of water. If washing will not suffice, you can compound the blemished surface and polish it after so its gloss will be restored. If polishing does not work, you can wet sand the problem area with 1500-2000 grit sandpaper before doing the compounding and polishing process. Should refinishing be needed, you must sand the blemished area with the right sandpaper and wash it with the baking soda solution before you finally refinish. In severe chemical etching cases, you must remove the finish right up to the bare metal of your car’s surface.

Prevention:
Always remove harmful contaminants that can be dissolved by water through regular washing with the use of clear water and detergent. You should also wax or polish your car occasionally. As much as possible, do not park near factories that may releases chemical byproducts into the air. You should also refrain from parking under electrical wires where your car may be subjected to bird droppings or under trees where it may get contaminated with tree sap.During your car’s refinishing process, it is also best if you will make use of an acrylic urethane basecoat and clearcoat system so your car will be given maximum protection from chemical or natural elements.It is imperative for you to take note as well that when you are buffing or sanding a basecoat and clearcoat finish, you should see to it that the clearcoat film’s thickness should be at least 2 mils as this helps sustain proper protection against the ultraviolet rays of the sun. Should mending a blemished area result in the removal of more than .5 mils of clearcoat, refinishing is definitely advised.

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