A little elbow grease is ok On a 09 suburban, It would take a lot to do it all by hand.
It may take some paint correction, but to my advantage (and laziness), I have never cleaned the outside (had it for 9 months) the previus owner mostlilky never had it cleaned, and would not have done it her self. But the dealer that she bought it from did have it detailed (there is a sticker on the windshield).
I know that it would not be the same as a machine, but are there any issues/advantages to using the machine products by hand on these areas?