WA-8555 is the GM corporate Black paint code used across the Chevrolet Camaro and Pontiac Firebird third-generation F-body. The 'WA-' prefix is GM's internal supplier-side code — distinct from the RPO sticker color callouts on the consumer-facing window sticker. Each WA- code refers to a specific PPG / DuPont / BASF formulation; WA-8555 is the high-volume black that runs from the start of third-gen F-body production in late 1981 (1982 model year) through end-of-line in 1992.
F-body paint from approximately 1980 onward uses two-stage basecoat / clearcoat application — a pigmented base layer followed by a clear urethane topcoat — rather than the single-stage acrylic enamel that defined the Mopar high-impact era a decade earlier. The clearcoat layer is what gives 1980s+ black its characteristic depth-of-image when freshly waxed and what makes a swirled or oxidized clearcoat the most common cosmetic defect on a surviving car. ThirdGen.org's reference paint threads are the standing community reference.