Da VIN 'P" Code

John Mahoney was discussing the paint codes, specifically "Cordoba Brown"

Sorry for jumping in, and correct me if I am wrong. I believe the difference being discussed on the cordoba brown, (misspelling aside) is a difference in Paint Suppliers. I have a 69 Javelin in Alamosa Aqua. After studying chart after chart for this and my Ramblers and Gremlins, I think it works like this:
       A paint code without the "p" is a Lustre-Gard baked acrylic enamel (American Motors Standard)
    A paint code with the "p" is on the color sheets by various makers (usually Martin-Senour or DuPont) and is called a "poly" as in "Cordoba Brown Poly" Does this mean "Polyurethane"?
    Generally, from what I have seen, codes which end in "A" are supplied from Rinshed-Mason, and are generally Irridescent, or "custom" colors (maybe "alternate colors" is a better term) ! such as the Big Bad colors, and S/Crambler, and the reflective colors for The Machine.
For example, the paint code for my Javelin is 68A (no "P"), which is "Alamosa Aqua Irridescent". This is a color supplied by Rinshed-Mason, or R-M as the paint people call it. The same color as "P68" is supplied by Martin-Senour and is called "Alamosa Aqua Poly". On the charts in the usual line catalogs, it is called simply "Alamosa Aqua".
In many cases, the AMC colors are referred to without the "P" prefix, and I have several cars like this that just have a two-digit number on the data plate, without a "P" before or an "a" after.
Hope this helps, but if I'm an idiot, please take it easy on the correction. I'm certainly no expert.
    Mike
    Route 66 Rambler