Back in the days when my Dad use to polish and wax his Caddy it was all by hand. I still think that you can get results by hand on single stage and clear coat paints.
that looks incrdible... thats why my next car is gonna be a black one
as for doing it by hand. i never doubted that one can achieve that by hand. its swirlremoving that needs a machine. that or 100hours+. but as for a paint cleaner and sealer, doing a detail that looks awesome is 100% possible..