very good info. i have been using those methods for several years. but now, i have to use ONR since car washing is not allowed at my place.
i would like to add a few things (and hopefully i am not repeating anything you said and i missed):
1. when washing, always move the sponge, mitt, mf towel from front to back in straight lines
2. when drying (if not using the leaf blower, obviously), motion of the drying mf towel should be front to back with lifting of the towel when moving from left to right (or vice versa) along a panel.
3. when drying, be sure not to apply lots of pressure to the towel. some folks lay the towel down and pat dry then lift the towel up without rubbing against the paint. it is moved to another section and then patted again.
4. some folks choose to use detail spray when drying the car. i don't do this but it can be something to try out esp. if you have hard water in your area.
5. always inspect a mf towel for contaminants (even if it is brand new or fresh out of the wash).
6. when washing mf towels, be sure to keep the really soiled ones separate. have those soak for a bit before washing. i use mf-specific detergent but that may be taking it to an extreme.