Bronco L6-300 4.9L VIN Y 1-bbl (1983)
Paint: Technical Service Bulletins
Paint - Cosmetic Damage From Airborn Materials
PAINT COSMETIC DAMAGE FROM AIRBORN MATERIALS
Article No. 89-13-3
FORD:
1989 and prior ALL FORD LINES
LINCOLN-MERCURY: 1989 and prior ALL LINCOLN-MERCURY LINES
LIGHT TRUCK:
1989 and prior ALL LIGHT TRUCK LINES
ISSUE:
Paint may be damaged from various sources of airborn materials. The two different types are:
^
Inorganic
^
Organic
Sometimes it is hard to identify the type of paint damage and know how to remove it. This TSB article gives detailed information and descriptions of
both types of airborn materials. It also outlines the service procedures for treating them.
ACTION:
If service is required, identify the source of damage involved by referring to the following information. Use the following recommended
service procedure to correct concerns.
INORGANIC AIRBORN MATERIAL
The effects of inorganic airborn materials can be seen as:
^
Dark blotches in the paint where the pigment in the paint surface has been attacked
^
Irregular spots that are cracked or etched around the edges and dull in the centers.
^
Small orange colored spots caused by iron particles may appear on the paint surface.
Generally, materials that attack a paint film are either acidic or alkaline in nature.
Sulfuric and nitric acids, in general, cause extreme damage to automative paint finishes. Even very small concentrations of the same materials can cause
chemical spotting damage. Due to evaporation and condensation, these acids can create severe etching "spots" that may eventually crack or lift the paint
film after some time in service.
Although some automotive finishes are more resistant than others, none are completely immune to these chemicals. The most resistant paints used today
are the urethanes because their resin system is least likely to react with chemicals. Air dry coatings are more susceptible to attack only when they are
fresh. The longer the paint dries the more resistant it becomes.
