I can appreciate wanting to keep a $10K paintjob looking as best it can. I personally believe no amount of time or expense are enough. I collect only the purest mountain spring water and truck it 400 miles home. I wash my Cobra only when the air temp is between 74-76 deg F and there are no clouds in the sky. I first set up my bird distractors to scare away all of the birds in the neighborhood and settle in to wash.
I use only the finest homemade organic non-polluting soap with a mit made from imported Egyptian cotton that has only been handled in its life by virgins. I then sprinkle the mountain spring water on and say a quick prayer given to me by a Tibetian monk. I measure out exactly 300ml of soap and apply in straight lines that are marked by a laser guide. AFter allowing to sit for exactly 12 minutes, I rinse with spring water, followed by a quick dry using only a leaf blower. Then a second rinse and dry with leaf blower.
Then I dab moisture spots with virgin Egyptian cotton towels.
THERE....NOTHING TO IT
Just a little levity boys....actually I do use the leaf blower. Couldn't find a single virgin however for the cotton towels....