Hey BlackSunshine,
I feel alot of the time it is a waste of time to rewash the car after claying. If I am going to clay, I am going to polish. This could be an intermediate polish, then final polish, or even more at times. The type of clay "may" depend on some of the issues people have brought up in the past of washing or not washing. One thing to ask is if you are using a clay with or without abrasives. IMO (and I stress that), even if you use one with abrasives (mild or medium grade), the chances of you doing damage while polishing (w/o washing) are slim to none. Otherwise, why would we clay with such a damaging tool in the first place?
So after claying, I go straight to polishing with the PC or rotary, possibly multiple steps of polishing, and then go to a wax/sealant. I don't rewash the car unless I use the rotary and a product that dusts up a lot. That's what I do~~