Gee Bee R2 red color
Dunno about the FSN, it was I believe painted with Randolph Dope - you could probably find a match for it in the Stitts line of paints.
I have a book at home about the reprocuction that was built several years ago by Steve Wolf and Delmar Benjamin - I had the good fortune to get up close to the aircraft and take several photos of it; I believe that it has "Randoph" painted on the tail. I will look thru the book and dig out the photos if I can lay my hands on them. Love the airplane - afraid to build it!
Jeff