The OP's L245DT would be the old Kubota orange color,not the newer version.If you want to brush the paint, then consider Chevrolet engine paint. I use engine paint from Bill Hirsh Auto in Newark NJ. It is $42 a quart, and it brushes on and dries without any brush marks. They presently are out of gallons which is usually priced at 3 quarts. It can be thinned with xylene.
Great idea though!