G 20 Van V8-379 6.2L DSL VIN C FI (1992)
condition at a later date.
Note:
Many vehicles have some type of plastic exterior body panels (cowl vent grilles, fascias, front end panels, rear fenders, etc.). These panels are not
subject to DELAMINATION and therefore do not require refinishing. If painting of these panels is required for color uniformity, scuff sand and
color- coat only (and clearcoat if basecoat/clearcoat system is used).
Note:
Two tone lines, feature lines or body side molding treatments near mid-door height are appropriate break lines. If no such convenient break lines are
present, the entire panel above the next lower break line must be refinished and the portion of the panel below that break line should be COLOR-
COATED ONLY (and clearcoated if basecoat/clearcoat system is used) for color uniformity of the repair.
Note:
Pickup boxes which are covered by caps, bedliners or tonneau covers do not receive direct exposure to sunlight, and normally would not be repaired
under this procedure. However, if the inside of the box has been uncovered and experienced DELAMINATION, use the appropriate Labor Operation
Number.
Note:
Certain two tone applications on trucks using the high potential colors (Blues, Grays and Silvers) may require that only portions of the vehicle
surface be refinished. Examples would be:
Example 1.
Blues, Grays and Silvers as "insert colors" on vertical surfaces with other, non-high potential colors above the insert (or break line).
Action:
Refinish the "insert color" only, between the break line and body side molding (or to the lower feature line on certain vehicles).
Example 2.
Blues, Grays and Silvers on surfaces above the break line with other, non-high potential colors as "insert colors".
Action:
Refinish the surfaces above the "insert color" or break line only.
Example 3.
Blues, Grays and Silvers used as both the primary and "insert colors".
Action:
Refinish both high potential color surfaces above the body side moldings (or to the lower feature line on certain vehicles).
Vehicles should be repaired with the same type materials they were manufactured with; repair basecoat/clearcoat with basecoat/clearcoat materials and
monocoat with monocoat.
PAINT REPAIR PROCEDURE
1.
Some vehicle components will be removed from the vehicle while others will require masking. The list located at the end of this bulletin will
establish the removal items. Items not found on the list and non-repair areas are to be masked.
2.
Prior to removing the paint finish, clean the area to be refinished with an appropriate wax and grease remover to remove any contaminants.
3.
Remove the original finish of paint down to the ELPO primer surface using an orbital D.A. sander, leaving the ELPO surface intact. This can be
done in "stages" using 80 grit (or finer) discs to remove the majority of coating, followed with 180 grit (or finer) discs to remove the remainder of
material down to the ELPO surface and any chalky residue or degraded ELPO that may remain. Avoid sanding through ELPO to bare metal in
order to retain maximum corrosion protection.
-
An alternative in some geographic areas may be plastic media blasting such as may be provided by members of: - Dry Stripping Facilities
Network 1-800-634-9185 *
* We believe these sources and their equipment to be reliable. There may be additional manufacturers of such equipment. General Motors does
not endorse, indicate any preference for or assume any responsibility for the products or equipment from these firms or for any such items
which may be available from other sources.
Important
Additional time or payment beyond established allowances in this bulletin will not be allowed.
- The use of a razor blade on large flat surfaces is not recommended because of the potential to chip. gouge or otherwise damage the primer surface.
If razor blade technique is used, the application of a "guide coat" prior to wet sanding should also be used.
