Rick,
I've owned a sandcar for about 17years. so here's my $.03
My first car was a VW beam front end and swing axle trans. I used to wash it with soap and the hose. then I'd blow it off with compressed air.
I don't think this is the best way. water WILL get into areas and rust.
.
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So now, with the new car that I got a couple years ago, I got a new way of cleaning.
1. vac out the seats.
2. (outside) blow the car off with compressed air.
3. wipe it down with a damp towel. This will leave streaks for now its ok.
4. use a product by Turtle Wax called ICE. This stuff is awesome. Squirt it on a small terrycloth rag. Wipe it allover the car in sections. let it dry, and use a micro-fiber towel to polish it off. Wallllla, Should look good.
sound like a lot of work? Well it is when you'd rather be BLOGGIN' on DDR.
Good luck,
R-
Interested to hear others ideas.