COMPLETE OR PARTIAL REPAIR OF HIGH SOLIDS ENAMEL

MODELS: 1982-83 "S" TRUCKS

The following procedures are recommended when repairing exterior panels on the above high solids enamel painted vehicles.

Procedure - Complete Panel Repair

Thoroughly clean exterior of vehicle with detergent and water, followed by a recommended wax, grease and sihcone remover.

Block sand with 400 grit paper.

Treat any bare metal with a suitable metal conditioner.

Apply primer surfacer as required.

Block sand primed areas with wet or dry 400 grit paper.

Mask off

Blow off all dust and wipe repair areas with a tack rag.

Apply sealer per manufacturer's directions.

The following products or equivalent may be used:

Rinshed Mason - Clear Adhesion #811 Ditzler - Pigmented Sealer #DL-1970 DuPont - Clear Midcoat #222-S Sherwin Wilhams - Intercoat Sealer #PlC 48 Acme - Intercoat Sealer #571 Rogers - Intercoat Sealer #4571 Martin Senour - Intercoat Sealer #3061

Apply acrylic lacquer color until full hiding is achieved.

Allow to dry overnight and compound exterior surface, including fascias (flexible panels).

Procedure - Partial Panel Repair

The success of a spot or partial panel repair of O.E.M. high solids enamel with lacquer depends largely upon thorough cleaning and preparing the surface with clear sealer and the use of a blend coat after color application. The blend coat significantly reduces the possibility of scaling at the perimeter of the repair upon compounding and final polishing.

Clean the surface well beyond the intended repair areas with a suitable grease, silicone and wax remover.

If required, feather edge broken paint film and condition bare metal. Apply primer-surfacer in a sufficient number of coats and sand in the usual manner. Blow off all dust and wipe repair area with tack rag.

Apply the clear adhesion sealer following manufacturer's recommendations for spraying viscosity, number of coats and drying time. Pigmented sealer should not be used for partial repair. Apply sealer 3-4 inches beyond intended edge of color application. For recommended sealers, see complete panel repair.

Apply acrylic lacquer topcoats for proper hiding and color match.

Apply all topcoats within the area previously sealed.

Allow 15-30 minutes for the last color coat to flash. Then apply two passes of blend coat material at 15-20 lbs. gun pressure to melt in overspray, followed by two coats over the entire repair, staying within the sealed area.

Allow the repair to dry thoroughly. Rub and polish beyond the repair area.

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.