Sparkie,
I can offer some minimal advice (as I ride and take care of my own ride)...
First, you "can" use water, but do so easily. For example, do not use high pressure towards the carbs, intakes, and electronics. I use to do a standard hoze wash, but for the past three years, I've switched to simply spritzing water from a spray bottle, and gently rubbing with a towel.
Next, be very careful of pinstriping. Some of the pinstripers don't use auto quality paint, so it can be taken off (expecially if you try to use power buffers).
Finally, some wheels (like my Goldwing) are bare aluminum (not the clearcoat stuff like on my BMW 330 convertible), so they potentially can take lots of work. If you use any type of aluminum polish, make sure that you either use something with a protectant in it, or put some type of wax on after you finish.
DO NOT put any tire shine on the tires.
If the bike has a windshield, be gentle. These are made of either plexiglass or Lexan. They scratch very easily. Be sure and use straight strokes and minimal pressure. DO NOT put RainX on them or they turn milky.
I don't do a "professional job" on mine, but at least once a week, I spritz and wipe it down, and hit it with a quick detailer (Meguiar's NXT Speed Detailer). About once a month, I apply wax (Mequiar's NXT Tech Wax). I use Flitz polish on the wheels, but Mother's Billet Polish works great as well.
A word of warning... If you think auto owners are finicky about "their baby", you ain't seen nothin' yet. Screw up a motorcycle and it might just be the last thing that you ever do. ;-)