What type of spray novel fits the product straight up and down nozzle or T shape nozel ? It is T shaped. for best results use with Rust-Oleum inverted striping paint spray How to operate it ？ 1.Shake aerosol vigorously for a minute before use. 2.Place can upside-down in holder with long side parallel to axle. Slide can towards cart center until it snaps. 3.Push machine and squeeze hand lever to activate spray. Does this make crisp lines on concrete for a football field? Depends on the following factors:1.Surface type and preparation 2.Height of tip from the surface being sprayed 3.Quality of the spray paint 4.If there is any type of breeze occurring while spraying that will move the atomized paint away from the line How do I get it to do 4"? Notice the wing nuts on each side of the unit. As you move them up and down the stripe gets wider or more narrow. Raise to make line wider,lower to make narrower.Make sure you're using the correct paint can with the proper tip. Can i do dotted lines with this machine,if yes, Will each dotted lines be the same length ? You can create dotted lines by pulling and releasing the trigger on the handle, similar to pushing a button on a spray paint can. Each dotted line may not be the same length unless you measure and mark where you want to start and stop using chalk