For smaller projects, you can also try spray cans of Dupli-Color Engine Enamel, DE1620 Chevrolet Orange. I tried it on a small spot on my tractor, and it matched perfectly. It can be found at auto parts stores for at least half the price of the Kubota orange spray cans. I also used Rust-Oleum 7784 Charcoal Gray on my light brackets that I mounted to the ROPS.
I have a can of each of the Kubota orange and grey on hand just in case. I have a landscape rake that I need to repaint because it is painted Case red, so the Dupli-Color will be perfect for that. I hear the Kubota paint is very high quality, but it's too expensive to use on certain implements, so the cheaper paints should work fine for those.