Here's an 1820 paint recipe I just ran across, from the Russian American Company, used here in Sitka. The recipe was deemed good enough to send across the Pacific, back to company headquaters in Russia.
I'll include only the imperial equivalents.

"Paint for wooden roofing or walls
16 mugs or 2 buckets

6.5 gal water
1.8 pounds green vitriol
13 cups red ocher or yellow ocher
13 cups sifted rye flour

"From the two buckets of cold water, remove two mugs and dilute the flour in it. Put the remaining water with the vitriol and red ocher on the fire and when it boils add the remaining water and flour. Stirring constantly, boil the whole mass until it will begin to coat a board evenly and thickly.
"One should apply this compound hot, but the roofing or wall at the time of painting should be in the shade, because if the compound is heated with the sun's rays while painting or if the walls will be heated, the compound will come off.
"Cover with this compound once, and repeat no sooner than after a year, and not two times running.
"Do the same if yellow ocher is used instead of red."


I'm not sure if Glidden will start up a new line...

Zach