As was said before is correct, Preparation, Preparation, and mainly Preparation. Tractor paint is just plain ole Oil Base Enamel, just like the paint on Grandpa,s Model A or his John Deere. Good durable paint job that will if applied right last for several years. First thing is the primer, I use the tractor primer, Why you ask, well it has rust inhibitors in it and is a sealer of type, apply 3 coats and let it dry for a few days and wet sand with 400 until baby butt smooth. That step is the key to a good paint job,surface prep, Now that the surface is ready, sanded, masked off, wiped down with prep solv, the paint is ready to be put on. Most equiptment paint requires thinning with either Napha or Mineral Spirits about 20%,spray the first coat where it just covers the cab with color, not to heavy it will run/sag, not good, wait at least 30-45 mins for the second coat and it can be a little heavier and completely cover the cab with color, this is a fine line between a good color coat and to much paint causing runs, the 3rd coat can be a lot thinner, maybe as much as 50% and wait at least 1 hr before appling, turn the pressure up about 10 more pounds on the gun, this coat will let everything kinda blend together and settle in real smooth, just don't get carried away this is kinda thin and will run quick, when this coat is done unhook the gun and get out of the booth and stay out for several hours. Enamel paint dries slow and going in and out of the booth stirs up dust and it settles on the paint. Another hint is to use hardener (Catalist) in the paint about 1 pint to a gallon and dont mix the whole gallon up at one time and don;t put the mixed paint back in the unmixed paint, it will set up in the can. Doing this kind of work requires patients, skill, and passion, if you don't want to take the time to do it right and show off your talent and pride go down to the local car lot and buy you something to drive and be like everybody else, or build your ride and drive it with PRIDE.