Bill D said:
The way to get around this possiblity is to use several mitts per wash. When in doubt or after going over a known dirtier area, switch to a fresh,clean one. It's how I would "invest in my paint" and save the time and frustration of having to polish out marring later.
I would agree, and take it one step further. After you are done washing or during the washing process, grab your wash mitt by the cuff, hold it in a vertical position, and take the hose and stick it inside the mitt and "blast" the dirt to loose and "drive" it to the outside of the mitt. Of course, this is easier with a cotton mitt then sheepskin mitts (because of the hide), but it even helps on the sheep skin. After you are done "blasting" it from the inside, continue to hold it vertically, and "blast" down the mitt at an angle with hoze to drive the dirt "down and out" of the mitt, and not back "into" the mitt.
The above is the reason I don't like wash pads (can't rinse them from the inside out) of any sort......... especially synthetic ones that tend to "grip" and hold the dirt.
Remember........
2 bucket method. (with grit guard)
Several high quaility mitts
High quality car wash soap with lots of lubrication
Use "dedicated" mitts for specific areas.
Re-cycle your paint mitts "down" to "grungy" duty after a while........ don't try to make one mitt last forever.
Rinse the mitts frequently during use.
Take care of the mitts when your done.