GM powder coat spec: clear gloss code meaning explained

Summary for gm powder coat spec Discussion

The thread on GM spec. WPPGLA for powder coating asks what the code letters mean in a GM powder coat requirement. Ralph Hetfield explains that 0848 is the color code, while Lokesh Khurmi says GLA refers to the gloss level of the A-surface and that it is 5–7 degrees. The discussion is brief and focused on decoding the specification rather than on application details. A later question from Gino Tighe asks for the powder coating manufacturer and code to match the yellow rims on a 1998 Corvette Pace Car, but no answer is shown in the excerpt. Overall, the useful takeaway is that WPPGLA includes a gloss designation, and GLA is not a generic gloss label but a specific low-gloss range tied to the A-surface.

+++

Q. What do the letters WPPGLA 0848 represent in a powder coat requirement by GM? I know the 0848 represents color. I think GLA represents gloss level, but what level?

Ralph Hetfield
Consultant to an automotive tier 3 Powder Coater – Benton Harbor, Michigan, USA

A. GLA is the gloss level of the A-surface. It has a value of 5 – 7 degrees.

Lokesh Khurmi
– Toronto, Canada
2005


Q. I am looking for the Powder Coating MFG and Code for a 1998 Corvette Pace Car It’s Purple with a yellow strip. I do have a wet paint code: waeq 5387- basf/r-m 225678 but this doesn’t help me. The rims are Powder Coated a Yellow and Need the Powder coating Code to Match. Can any one help with this?

Gino Tighe
– Pittston Pennsylvania
May 2, 2012