Dave, If you are going to do wheels you might check your local powder coater, the price will be cheaper, more durable and easier than spraying yourself. As for cheap paint, 2 quarts cost usuallly close to a gallons cost, plus activator, reducer and thinner for cleanup and then possibly a clear coat you would have quite a bit laid down in cash. Our local powder coater does wheels in 1 day, and inside the rim is done so as to not rust as well he even takes them down to the local tire shop and has the tires put baclk on for you expect to pay 30-45 per wheel which is cheaper than paint! A million colors also. Best of luck Matt