SCUFF/SCRATCH REMOVAL PROCESS ALUM. WHEEL WITH CLEAR COAT

SUBJECT: PROCEDURES ON SCUFF/SCRATCH REMOVAL FROM CLEAR COAT PN ALUMINUM WHEELS

VEHICLES AFFECTED: 1981-1993 MODELS WITH ALUMINUM WHEELS

THIS BULLETIN SUPERSEDES AND REPLACES CORPORATE BULLETIN REFERENCE NUMBER 010103." THIS BULLETIN IS BEING REVISED TO INCLUDE 1991-1993 MODEL YEARS.

The clear coat on aluminum wheels can become scuffed and dull if the car is exposed to frequent automatic car washes with aggressive tire brushes.

Following are procedures for polishing out minor scuffs and scratches from the clear coat on aluminum wheels.

Outlined are three basic procedures which progress from least aggressive (A) to most aggressive (C) depending on the degree of scuffs or scratches in the clear coat.

A. CONDITION - MINOR SURFACE SCUFFS AND SCRATCHES. ------------------------------------------------- Procedure: --------- 1. Clean the wheel surface with soap and water and dry thoroughly.

2. Clean the wheel with 3M general purpose adhesive cleaner, P/N 08984, or equivalent and dry.

3. Apply 3M finesse-it finishing material, P/N 05928, or equivalent to the affected area and polish using a 3M superbuff polishing pad, P/N 05705, or equivalent on a low speed polisher (1 500-2300 rpm's).

4. Begin with firm pressure on the polisher in the beginning and gradually reduce pressure as the finishing material begins to dry up.

5. Apply a coat of 3M liquid polish, P/N 05939 or 05993, or equivalent to protect the clear coat.

B. CONDITION - MORE SIGNIFICANT SCUFFS AND DULLING NOT REMOVED DURING PROCEDURE A. ----------------------------------------------------------------------------- Procedure: --------- 1. Perform steps 1 and 2 from procedure A.

2. Apply 3M imperial microfinishing compound, P/N 0601 1, or equivalent and buff with a 3M superbuff compounding pad, P/N 05701, or equivalent on a low speed polisher. A second application may be necessary.

3. Inspect wheel finish. If scuffs and dulling have been removed, proceed to step 4; If not, proceed to procedure C.

4. Finish polishing the wheel with 3M finesse-it finishing material, P/N 05928, or equivalent and a superbuff polishing pad, P/N 05705, or equivalent on a low speed buffer.

5. Apply a coat of 3M liquid polish, P/N 05939 or 05993, or equivalent to protect clear coat.

C. CONDITION - VERY SIGNIFICANT DULLING, SCRATCHES, SCUFFS WHICH HAVE NOT PENETRATED THROUGH THE CLEAR COAT. ------------------------------------------------------------------------- 1. Clean wheel with soap and water and dry.

2. Clean with 3M general purpose adhesive cleaner, P/N 08984, or equivalent. Wet sand the affected area with 3M imperial wet-or-dry paper grade 1500 on a #20 sponge pad, P/N 05526, or equivalent.

3. Occasionally squeegee away the water and check progress. Stop sanding when an even dull appearance is reached.

4. Polish the clear coat to a high gloss using 3M finesse-it finishing material, P/N 05928, or equivalent with a 3M superbuff polishing pad, P/N 05705, or equivalent on a low speed polisher (1500-2300 rpm's).

5. Apply a coat of 3M liquid polish, P/N 05939 or 05993, or equivalent to protect clear coat.

NOTE: The following tips will result in an improved appearance when polishing or buffing.

0 Begin with firm pressure and reduce pressure as the polish or compound begins to dry.

0 Do not polish with a dry pad. Use enough material to keep the surface wet.

0 Use extreme caution when polishing or buff ing sharp corners or contours to avoid burning the clear coat. Hand rubbing may be necessary.

BULLETIN REFERENCES:

Corporate Ref. 010103

General Motors of Canada 90-2-215 Chevrolet Division 90-32l-3E Oldsmobile Division 90-T-151 Buick Division 91-10-10 Cadillac Division 90-1-66

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.