Has anyone painted their car with rollers

if you think about it, it's like old Henry Ford use to do.
they painted the cars with a Brush and Hand rubbed it out.
i wonder how much paint would have to be sanded off just to smooth the finish out.

there are U Tube videos of people painting their cars with Rustolem and buffing them out too.
never see this guy doing it. would much rather just spray it.