Body - Bumps Or Rust Colored Spots In Paint
TSB # SB07-11-S004Issue Date: MAY 2007
Bumps Or Rust Colored Spots In Paint Due To rail Or Iron Dust
(This Bulletin Supercedes SB97-11-L007)
Vehicles Affected:
2003-2007 Isuzu Ascender
2007 Isuzu i-290/i-370 (TI)
2006 Isuzu 1-280/1-350 (TI)
Service Information
This bulletin is being revised to add additional model years and repair information
Condition:
Some affected vehicles may experience damage to the exterior paint surface due to industrial fallout or acid rain.
Possible Cause:
Industrial Fallout
Refers to minute particles of iron produced from the friction between train wheels and the tracks or from a facility producing iron dust (e.g. a steel yard etc.). It can appear as either bumps or rust-colored spots on the paint surface. Paint damage of this type occurs most often when the vehicle remains parked in one location for an extended period of time.
Acid Rain
Refers to rainwater made acidic or alkaline by impurities in the air. It appears as water spots and/or discolored spots on the paint surface. Damage from acid rain can vary from slight to severe depending upon how long the impurities have remained on the paint surface.
Correction:
This Service Bulletin addresses three repair levels based on the cause and extent of the damage:
^ Repair No. 1: Surface Level Contamination (to repair damage from industrial fallout).
^ Repair No. 2: Clearcoat Etching (to repair damage from acid rain in which the clearcoat has been damaged or penetrated).
^ Repair No. 3: Basecoat Etching (to repair damage from acid rain in which basecoat penetration has occurred).
Since the extent of the damage can vary significantly from one affected area to another proper diagnosis of the damage extent is critical to the success of the repairs. Diagnosis should be done on properly cleaned vehicle horizontal surfaces (e.g. hood roof box etc.) and under fluorescent lighting strong enough to light the vehicle surface without shadows yet not so strong that it washes out the outlines of the imperfections.
Repair No. 1: Surface Level Contamination
1. Move vehicle to cool shaded area and ensure vehicle surfaces are cool during removal process.
IMPORTANT:
Do Not perform this removal process in direct sunlight or on a vehicle with either hot or warm body panels.
2. Wash vehicle with high-quality automotive detergent. Rinse thoroughly.
3. Lightly mist Auto Magic # 49 Body Shine to a 3-foot-square section of affected panel.
IMPORTANT:
Use ONLY Auto Magic # 49 Body Shine, or plain water, to lubricate the clay. Do Not use soap or solvent as a clay lubricant.
4. Knead bar of Clay Magic(R) CM 2200 (Blue) into flat pancake shape.
IMPORTANT:
The clay bar can be easily contaminated if handeled with soiled hands. Be sure your hands are throughly clean before kneading the clay bar.
5. Gently rub clay bar over affected surface in a circular motion using light pressure. Gradually increase pressure as needed to remove all surface contaminants.
6. Wipe treated section with clean soft towel.
7. Repeat above steps for remaining sections/panels to be treated.
8. Once all repairs have been completed hand polish the vehicle with a high-quality non-abrasive automotive wax.
IMPORTANT:
To achieve the best results with clay magic(R), be sure to use the following guidelines:
^ Knead the clay bar periodically to bring fresh clay to the surface.
^ If the clay bar is accidentally dropped on the ground be sure to check the clay bar for contamination.
^ If a portion of the clay bar is contaminated pinch off the contaminated portion and dispose of it. Knead the remaining clay bar into a flat pancake shape and continue.
^ Do Not apply contaminated clay to the vehicle - it could scratch the paint finish.
^ If the clay bar becomes too contaminated dispose of it and continue with a new bar.
^ When finished using Clay Magic(R) store it in a container that has been lubricated on the inside with # 49 Body Shine.
Repair No 2: Clearcoat Etching
1. Move vehicle to cool shaded area and ensure vehicle surfaces are cool during removal process.
IMPORTANT:
Do Not perform this removal process in direct sunlight or on a vehicle with either hot or warm body panels.
2. Wash vehicle with high-quality automotive detergent. Rinse thoroughly.
3. Using appropriate paint thickness gauge measure paint thickness of affected panel(s). Measure each panel in several areas (at least five points) to obtain average thickness of each panel.
4. Apply finesse-type polish with foam pad.
5. Clean affected panel.
^ If damage has been repaired remove swirl marks using electric buffer and polishing pad. Hand polish vehicle with high-quality non-abrasive automotive wax.
^ If damage remains clearcoat has been penetrated. Proceed with step below.
6. Select a small test area on damaged panel.
7. Wet sand damage area using American grade ultra-fine sandpaper (1500 to 2000 grit) and rubber sanding block.
IMPORTANT:
Be sure to use ONLY American grade sandpaper. Certain imported sandpapers have a "P" designation before the grit number and Do Not necessarily align with traditional American grits.
IMPORTANT:
Be sure to use ample amounts of water during the sanding process. Work slowly to prevent removing too much clearcoat.
8. Remove excess water with squeegee and inspect affected panel.
^ If damage has been repaired continue with sanding process for entire panel; then apply finesse-type polish with foam pad and remove swirl marks using electric buffer and polishing pad. Hand polish vehicle with high-quality non-abrasive automotive wax.
IMPORTANT:
Be sure to measure the affected surface with a paint thickness gauge after polishing or buffing. If more then 0.5 mil has been removed from the affected surface, the clearcoat MUST be reapplied.
^ If some damage remains or if base color is transferring to foam pad during polishing basecoat has been penetrated. Go to Repair No. 3: Basecoat Etching and follow steps.
Repair No. 3: Basecoat Etching
1. Sand to remove clearcoat from all affected panels.
2. Refinish affected panels in accordance with paint manufacturer's recommended procedures.
3. Once all repairs have been completed hand polish the vehicle with a high quality non-abrasive automotive wax.
Parts Information
Clay Magic(R) CM 2200 (Blue) and Auto Magic 49 Body Shine(R) may be purchased from authorized Auto Magic(R) distributors worldwide. To find the Auto Magic(R) distributor nearest you contact:
AWC
1275 Roundtable Drive
Dallas TX 75247
Ph: 800-826-0828 Ext. 1105
E-mail: info@autowaxcompany.com
With proper care and handling a single 200 gm bar of Clay Magic(R) CM 2200 (Blue) will service approximately five vehicles. A one gallon bottle of # 49 Body Shine(R) will service approximately 20 vehicles.
Always refer to the Isuzu Service Policy Procedure Manual for specific details on warranty coverage and policies. Reference published Labor Time Guide for claim processing if applicable.
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