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The aluminum roof part is painted according to the following procedure:
G 8.7.4 Painting outer door handles
WARNING: -> 2 "Safety regulations" and read the product-specific safety instructions on the container labels.
NOTE:
The outer door handles from the spare parts range are supplied ready-primed.
The door handles are painted according to the surface painting procedure for plastic components:
This is a source reference. Confirm exact model applicability in the original material.