I'm going to wash using Detail Mutant's method tomorrow or Friday as it seems to be the most reliable and safe one from what I've seen so far from someone who experiences winter like I do, but because I'm a beginner user I'm going to add a step or two just until I'm fully confident in the technique. This is my slightly modified method at a coin op
1. Pre-soak using the 1OZ to 16OZ solution as Ron noted (we had a hot spell and the bumper and rocker panels are really dirty, need the extra power), but my hand held sprayer is 1.5L in size so I'm going to fill it up to just under 1L mark and add 2OZ of ONR to make the QD solution (I think that's the proper dilution)
2. Rinse off with a pressure washer
3. Pre-soak the first two panels that I'm going to wash with regular diluted ONR to add some lubrication , and as I move further I will pre-soak the next panel and so on.
4. Clean with BRS and dry using hyper seal panel by panel
As I get comfortable I may reduce steps but I think this would be the most fail proof in reducing marring etc. as long my washing and drying technique is proper.