I use
3M Cleaner & Wax..for "Lightly Oxidized Surfaces"..(09009) which is the least aggressive of the 3M line of three. West Marine carries it. You need to decide which "Level" of 3M stuff you need. I use a slow turning orbital buffer to apply it to larger surfaces. Remove it with a terrycloth (Bath) towel by hand in any case. I have done this on a 32 footer by hand with good results. It comes off easy.
You can also apply it by hand which I also do around cleats, fittings and "difficult" surfaces. I have a 1986 20' Donzi runabout with a smooth foredeck..Vs. a Bow Rider.
You can apply this 3M stuff by hand... or by machine with equally good results.
NB