Thanks for the replies. I typically try to wash my vehicles every weekend and use S&W to make sure there is no soap scum left over. What I've been thinking about doing is using S&W in between washes and QD them also. That led me to wonder whether my LSP's would be effected, or to what extent by the increased use of S&W.
Regarding winter washes, when I can make it to a DIY sprayer-place, I had been using S&W and/or Bug Squash as a pre-soak but recently found the Eagle 1 Car Wash in a Bottle and have been using it. Steps-wet down surface, spray Eagle 1 stuff on it, then lightly spray with water. Soap foam forms and loosens the dirt and krud pretty well. I continue spraying until the soap foaming is over and it seems like the majority of the dirt and krud is washed away. I then go to my S&W to finish cleaning. :yes:
This combination works well for me, not to mention it gives a better bang for the buck... the Eagle 1 stuff is pretty cheap and seems to work well (word of warning regarding this Eagle 1 stuff - it is pretty concentrated so if you don't rinse it well you have some pretty bad soap scum left on the surface).