Four arms, 2 each side, if you include the flap lever. Another one for the fuel selector, could be on left or right? Then there's the radio, transponder, altimeter subscale knob, mags, carb heat, canopy release.... Crikey, an octopus with twice the normal alloctaion of arms couldn't do it....
Thing is... And I know this might be a tad obvious...
you don't need to operate all of these things at once! 
maxred - can I lend you a longer-handled scraper to use on that barrel?
