Koolest Kolers are only copying touch up and spray paint Schwinn colors. Radiant, Opel and all other types are not metal flake, and that's the problem. Schwinn's touch-up and spray paints are metal flake. Opal, radiant and all other metal reflective original colors are tinted transparent/translucent over lays, top coats.
Koolest colors are faking Schwinn's original factory paints. Moreover because they require a clear coat to mimic original it's pointless to use an aluminum base. Schwinn's spray can paints are a solid single metal flake color. It's not the simi transparent with metal flake they use. Using just a red lead or in some cases, gray primer, primer an original Schwinn spray can and applying a clear top coat you'd get a similar effect.. Including that; which ever color of primer is very important too. All color or absence of color plays a vital role in what objective, target color you what to achieve.
However, is the quest for Spicy Chestnut, I've seen original touch up or spray cans offered at ebay. just use that and clear coat it.
The problem is: if you scan original Schwinn bike, the metal reflections from aluminum base coat is distorting Schwinn's colored, translucent/transparent top coat in the scan for blending..
I.E. you have to eliminate the distortion from the aluminum base coat. Maybe, as I've I've contemplated for some time, to fliter out the metal flake Koost kolor's; use, strain that metal flake out. of their color coat.
To reach an exact duplication, you would need to filter all colors being reflected from within, aluminum base. That base, biased on my personal magnified observations ,, Under the badge, unaltered by sunlight, bright and brilliant as new, is very complicated. apparently, metal fleck mixed in clear And not simply clear but a clear that seems to have cracks or crackle behavior once set. .. Plus add in that, paint batches are not always perfect match each time a large batch is mixed.
I had a 81 Spicy Chestnut cruiser and, it had a batch mix change near and around the bottom bracket, It stood out but area was small enough to not interfere in whole appearance, the small area was slightly darker.
Schwinn would have to used a large paint suppler such as Dow or DuPont who were also making multiple layered, candy colors for auto Co.s. but who, like today, even back then shelf paint was only a single coat, same as Schwinn's spray cans from Schwinn stores.. Who made Schwinn's paint, no different in coating a Cadillac, but who made the color and what was the blend for each layer?
Or maybe if could get hands on a quantum super computer and design program to filter and figure it out.