Originally Posted by
Accumulator
Eh, this might sound much more, uhm..critical/snarky/bad than I intend, but if things didn`t get quite clean with just the pre-wash pressure washer rinsing, I`d want a different LSP. The rinsing gets caked with Winter [crap] vehicles look "already clean" before I even start with what I think of as "the real wash".
SWETM- I`m actually a little surprised that the "extreme dirty paint" isn`t a *LOT* worse! I don`t think that looks all that dirty for Winter, ours get much worse. Although the dirt/etc. you`re dealing with sounds a lot harder to wash off, so your products are indeed working well.
Coatings=crack- I`ve never seen any indication that the dirt "tumbling off" will cause even the lightest micromarring. I don`t have stupid-soft paint or anything, but still...I just pressure washer rinse utterly crusty vehicles with zero problems at all. Yeah, I was a little surprised that I could get away with it, but I always have. Whenever I tried pre-treating before using the pressure washer, it seemed like a complete waste.
YMMV of course, just relating my experience.