by JPCass » Sun Jan 11, 2015 12:30 am
First, I recently stripped later paint off a 1930s Mills machine that I'm working on, and can tell you that the final layer of original paint was something very tough and industrial-grade that was not coming off as easily as the rest of it - I just left a fair bit as a clue for any future restorer.
It occurred to me to look to 1930s car colors for inspiration - and some chips and digital color samples online did provide some good visual guides - and I thought that auto paint might be similarly tough as the original slot machine paint, but I discovered that modern car paint is formulated to be overcoated, extremely expensive for even small quantities, and further that they couldn't readily mix the old colors even when I had original formula references (though there may be a national color resource center that I could have gone through). I'm sure that there are specialty antique car paint sources that could be tracked down that could do better, but they're probably also prohibitively expensive.
I finally settled on Sherwin Williams oil-based enamel, mixed based on one of their chips which closely matched some of the old car and other period color examples I had found. They can also digitally match to a color sample, but you have to have something over an inch square that is solely the color you want to match.
Restored Mills 5c Extraordinary "barn find", long gone - now restoring 1934 5c Extraordinary Gold Award with original World's Fair reel strips
Restoring early Mills 5c Firebird (large coin view window)
About to take on a Mills 5c Vest Pocket