The PPG set-up is supposed to work off the PAINT number found on car data plates. The jobber you take this info to should contact the PPG Color Library for the mixing information; they will not have it on hand unless they already mixed the color for someone else in the recent past. The Color Library will pull their original paint chip standard from the storage vault and scan it with a computer based spectrometer. It will "read" the chip and print out the current mixing forumla (if it can be devised) for the jobber. NOTE THERE IS NO CHARGE TO THE JOBBER BY THE COLOR LIBRARY FOR THIS SERVICE. The expectation is that the jobber will get a paint sale. Normally the jobber will not disclose the actual formula; this is a suggestion by PPG and not an effort of being nasty. PPG does not disclose formulas to the general public, only to their jobbers.
It should be noted that there are some "exotic" K-F colors that Ditzler (PPG) did not offer as a mix. Also, they have colors going back to the 1920's and that some colors may be lacquer only and some may be enamel only.
For more info on this, contact the PPG Customer Service area of their website and let them know you are inquiring about antique automobile paint.
