I believe there are draw backs to the larger pads, you apply pressure to the center, the pads will flex and I would think little effect towards the far edges? Also when you are in tighter areas, above the vents, windows etc, it would think it would be a PIA to keep your product off of these type of items with a bigger pad.
As far as time, it depends. Like the hull, it held up pretty good from last year, I will hit it twice each side, once with the polish and once with the wax. About 90 max minutes each step (that does not include breaks for BS'ing or beer). The top sides show some chalking, ( I only wax it in the spring, the rest of the year its just washed) So they will take some time. The compounding, at least for me takes, twice as long as the other two steps combined.
Maybe if I did a mid season wax on the topsides it would save some time in the spring?
