Hey, looks like you've got all the info you need! These cats know their shit - they rack MAD cans everyday, i'm talking like.. 500 at least.
When you get all the paint you need, how about a trip to your local yard? The best way NOT to get caught is to hang around near the moving trains.. none of the workers are ever there.
And the best way to get from one side of the yard to the other, is jus to run FLAT OUT as fast as you can across all the tracks. If you take it slowly, they'll spot you!
Remember to hit all the engines you can.. and all the rail-shacks too.. no one paints the boxcars anymore.. that's just gay.