See Van's Accessory Catalog
Dick, Van's Accessory Catalog has powdercoat touch-up paint and some equivalent paint codes are listed.
Pearl Gray touch-up paint.
Part Number = PAINT, TOUCHUP PGRAY
Price = $4.25
It's hard to provide a permanent link to the listing but here's the description:
Some of the steel parts supplied in the kits are powdercoated. Scratches can occur and we have small bottles of touch-up paint for older GRAY parts. PAINT, TOUCHUP PGRAY. This is Cardinal brand, color GR-230.
More recent WHITE parts are Cardinal brand, color T009-WH111 90% gloss. We do not have touch up paint available for this. An equivalent Sherwin Williams code is PWS9-40002. A Dupli-Color applicator is also available from some auto parts stores: part code NG CC 362.
FWIW, I took a sample Van's powdercoated part to a local automotive paint store and the counterperson was able to mix me up a quart of PPG or whatever that was a good match.
--
Joe