Test methods and standards for gloss, haze, color, transmittance, paint adhesion, and chip resistance testing for automotive interior and exterior surfaces.
A coating can pass weathering, humidity and salt spray testing and still chip or delaminate in its first year on the road. Chip resistance (gravelometer) testing and paint adhesion testing after exposure show whether the coating holds up to stone impact and stress before launch.
Your part passed every mechanical test on the list. Then the OEM auditor walked the line, held it up to the light, and called it a fail. A gloss reading of 5.0 when the spec said 2.5 to 4.0. That’s not a cosmetic issue. It’s a real rejection, and it happens more than most engineers…