Roller painting tubing ?

anyone done it ?

I need to paint black gloss on the tubes of a dragster

I did half of it today with spray cans ,
sanded down the old flacking paint /rust and then spray bombing it so that it would not rust again,

But I need it to be a better finish on the areas you see that is not covered by the aluminum panels.
I am afraid it I really thin it out that the paint will go around the tube and start dripping,

Any ideas or is iot better to get out the compressor

thanks
Beaulieu