[Manitcor]

SUBJECT: BUMPS OR RUST COLORED SPOTS IN THE PAINT DUE TO RAIL OR IRON DUST (REMOVE RAIL DUST)

MODELS: 1994 AND 1999 PASSENGER CARS AND TRUCKS

CONDITION:
VISIBLE RUST COLORED SPOTS OR BUMPS ON A VEHICLE'S PAINT SURFACE FROM RAIL OR IRON DUST.

CAUSE:
RAIL DUST COMES FROM TINY IRON PARTICLES PRODUCED FROM THE FRICTION BETWEEN TRAIN WHEELS AND THE TRACKS AND GETS DEPOSITED ON VEHICLE SURFACES. IRON DUST CAN GET DEPOSITED ON THE SURFACE IF THE VEHICLE IS STORED NEAR ANY OPERATION PRODUCING IRON DUST SUCH AS A STEEL ORE YARD. EITHER MATERIAL CAN LAY ON TOP OF, OR BECOME EMBEDDED IN, THE PAINT SURFACE.

CORRECTION:
SINCE THE SEVERITY OF THE CONDITION VARIES, PROPER DIAGNOSIS OF THE DAMAGE IS CRITICAL TO THE SUCCESS OF REPAIRS. DIAGNOSIS SHOULD BE PERFORMED ON HORIZONTAL SURFACES (HOOD, ROOF, DECK LID, PICK UP BOX, ETC.) AFTER THE VEHICLE HAS BEEN PROPERLY CLEANED. THERE ARE TWO TYPES OF REPAIR MATERIALS RECOMMENDED TO REPAIR RAIL OR IRON DUST:
A. GEL TYPE OXALIC ACID:
- HAS THE CHARACTERISTICS OF THE LIQUID TYPE OXALIC ACID, BUT STAYS WHERE YOU PUT IT BECAUSE OF ITS GEL CONSISTENCY
B. CLAY TYPE NON-ACID BASED:
- REQUIRES SURFACE LUBRICANT DURING USE - HAS DIFFERENT GRADES AVAILABLE

CAUTION:
RAIL DUST REMOVER (OXALIC ACID) IS AN ACIDIC SUBSTANCE CONTAINING CHEMICALS THAT WILL BREAK DOWN THE IRON PARTICLES EMBEDDED IN THE FINISH. WHEN WORKING WITH RAIL DUST REMOVER, USE THE NECESSARY SAFETY EQUIPMENT, INCLUDING GLOVES AND GOGGLES. FOLLOW THE MANUFACTURER'S DIRECTIONS CLOSELY BECAUSE IT MAY REQUIRE SPECIAL HANDLING AND DISPOSAL.

IF, UPON INSPECTION, SOME PARTICLES ARE STILL PRESENT, THE VARIOUS MANUFACTURER'S PROCESSES CAN BE REPEATED.

AFTER THE REMOVAL PROCESS, SMALL PITS MAY REMAIN IN THE CLEARCOAT, AND CAN BE CORRECTED IN MOST CASES WITH A FINESSE/POLISH OPERATION. REFER TO CORPORATE BULLETIN 111702R (DIVISIONAL BULLETIN NUMBERS LISTED BELOW) FOR FINESSE/POLISHING TECHNIQUES.

DIVISIONAL BULLETIN NUMBERS
BUICK - 93-10-22 CADILLAC - T-93-104 GM OF CANADA - 93-10-158 CHEVROLET - 93-188-0B GMC TRUCK - 93-10-30 (CORPORATE BULLETIN 131060R) OLDSMOBILE - 07-93-106 (JULY, 1993 SERVICE GUILD - PAGE 106) PONTIAC - 93-10-28

PROCEDURE:
1. MOVE THE VEHICLE TO A COOL SHADED AREA AND MAKE SURE THE VEHICLE SURFACES ARE COOL DURING THE REMOVAL PROCESS. DO NOT PERFORM THE REMOVAL PROCESS IN DIRECT SUNLIGHT OR ON A VEHICLE WITH HOT OR WARM BODY PANELS.

2. WASH THE VEHICLE WITH SOAP AND WATER, DRY IT IMMEDIATELY AND CLEAN THE AFFECTED AREAS WITH A WAX AND GREASE REMOVER.

3. PERFORM THE REMOVAL PROCESS ACCORDING TO THE MANUFACTURER'S DIRECTIONS.
ONCE THE DAMAGE HAS BEEN REPAIRED, THE FINAL STEP INVOLVES A POLISHING PROCESS.
RAIL DUST REMOVER MANUFACTURERS USE BELOW OR EQUIVALENT *:

AUTO-MAGIC "R" CLAY MAGIC "TM" FALLOUT GEL AUTO WAX COMPANY INC. CAR BRITE "R" CORPORATION 1275 ROUND TABLE DRIVE 1910 SOUTH STATE STREET DALLAS, TX 75247 INDIANAPOLIS, IN 46203 PHONE (800) 826-0828 PHONE (800) 347-2439

*WE BELIEVE THESE SOURCES AND THEIR PRODUCTS TO BE RELIABLE. THERE MAY BE ADDITIONAL MANUFACTURERS OF SUCH PRODUCTS. GENERAL MOTORS DOES NOT ENDORSE, INDICATE ANY PREFERENCE FOR OR ASSUME ANY RESPONSIBILITY FOR THE PRODUCTS FROM THESE FIRMS OR FOR ANY SUCH ITEM WHICH MAY BE AVAILABLE FROM OTHER SOURCES.
IF THE RAIL DUST REMOVER IS NOT AVAILABLE IN YOUR AREA, CALL ONE OF THE NUMBERS LISTED ABOVE FOR A DISTRIBUTOR NEAR YOUR LOCATION.

WARRANTY INFORMATION:
ALTHOUGH RAIL DUST IS NOT THE RESULT OF ANY DEFECTS IN MATERIALS OR WORKMANSHIP, GENERAL MOTORS WILL CORRECT THE CONDITION ON VEHICLES DURING THE PRE-DELIVERY PROCESS.

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1998 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.