NEW CLEARCOAT (POLISH/CLEANING RECOMMENDATIONS). Chevrolet Corvette 1993

SUBJECT: NEW CLEARCOAT (POLISH/CLEANING RECOMMENDATIONS)

VEHICLES AFFECTED: 1993 CHEVROLET CORVETTE 'Y' MODEL

APPLICATION:

1993 CORVETTE

Starting in April, 1993, all Corvette models will use a new two component clearcoat.

This new clearcoat is significantly more resistant to environmental damage, and offers improved gloss retention. HOWEVER, while the new clearcoat is superior to previous materials, it may take up to 30 days to achieve ultimate hardness and mar resistance.

During this early period, the use of "aggressive" (brush type) automatic car wash equipment and polishing of the exterior surface prior to customer delivery should be avoided.

THE FINISH SHOULD NOT REQUIRE ANY POLISHING prior to delivery to the customer, however, if the finish does need polishing, it is important to follow the recommendations below:

0 It's important that a "Iess is best" approach be taken if polishing is required (only do the minimum required to correct the damage).

0 Only the correct materials or their equivalents should be used (See Chart).

0 The correct power tool equipment and speeds should be observed (final process step should include an orbital type polisher with speeds of 1,500 to 2,000 R.P.M.).

3M

Paint Recommended Repair Procedure Condition Wet Machine Sanding Compounding Glazing Hand Glazing*

1. New car prep Perfect It Imperial Hand or fine wheel Foam Pad Glaze marks (Glaze & Pad)

2. Coarse swirl Finesse-It II Perfect It Imperial Hand marks, chemical Finishing Foam Pad Glaze spotting or Material (Glaze & Pad) light oxidation

3. Overspray or Imperial Microfin- Perfect It Imperial Hand medium oxidation ishing Compound Foam Pad Glaze (Medium Cut) (Glaze & Pad)

4. Heavy oxidation Micro Finesse-It II Perfect It Imperial Hand or minor acid Fine Finishing Foam Pad Glaze rain pitting 2000 Material (Glaze & Pad)

5. Dust nibs, minor Micro Finesse-It II Perfect It Imperial Hand scratches, or Fine Finishing Foam Pad Glaze major acid rain 1500 or Material (Glaze & Pad) pitting 2000

6. Orange peel, Micro Imperial Microfin- Perfect It Imperial Hand paint runs, Fine ishing compound Foam Pad Glaze or sags 1200 or (Medium Cut) (Glaze & Pad) 2000

* Optional Step

MEGUIAR'S ---------

Paint Recommended Repair Procedure Condition Wet Sanding Cleaning Polishing

A. New car prep Swirl Remover (No.9) or fine wheel W-9000 Finishing Pad marks

A. Swirl marks, Swirl Remover (No. 9) chemical spotting, W-9000 Finishing Pad or light oxidation

A. Overspray or Heavy-Cut Swirl Remover (No. 9) medium oxidation Cleaner (No. 4) W-9000 Finishing Pad W-7000 Cutting Pad

A. Heavy oxidation or Heavy-Cut Swirl Remover (No. 9) minor acid rain Cleaner (No. 4) W-9000 Finishing Pad pitting W-7000 Cutting Pad

A. Dust nibs 200O Grade Heavy - Cut Swirl Remover (No. 9) Unigrit Sanding Cleaner (No. 4) W-9000 Finishing Pad Block

B. Minor scratches 200O Grade W-7000 Swirl Remover (No. 9) or acid rain Unigrit Sanding Cutting Pad W-9000 Finishing Pad pitting Paper

A. Major runs or 150O Grade Heavy-Cut Swirl Remover (No. 9) sags Unigrit Sanding Cleaner (No 4) W-9000 Finishing Pad Block

B. Major orange 150O Grade W-7000 Swirl Remover (No. 9) peel or acid Unigrit Sanding Cutting Pad W-9000 Finishing Pad rain pitting Paper

Meguiar's W-1000 polishing pad is universal and works effectively on all surfaces. This pad may be substituted for either the W-7000 cutting pad or W - 9000 finishing pad.

Contact your local 3M or Meguiar's representative and ask for a demonstration of their products. Their recommended procedures should be followed to achieve the best results.

We believe these sources, their equipment, and materials to be reliable. There may be additional manufacturers of such materials and equipment. General Motors does not endorse, indicate any preference for, or assume responsibility for the products or equipment from these firms or for any such items which may be available from other sources.

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.