2-6 can be interchangeable as it completely depends on how much decontamination is required. Also, and as I regularly wash the car I combine steps 2 & 3 and use only one product; BH Korrosol!
My steps are:
1- Alloy wheels (always first and use BH AW on dry wheels)
2- Tyres washed with BH Surfex HD with a dedicated brush (off course it it for tyres only
)
2- Snowfoam and dwell (I have found snowfoam to work better on a dry car rather than wet)
3- Rinse
4- Tar Remover/Decontaminate*
5- Rinse
Rest of the steps are
*I only use either BH Korrosol or CarPro IronX as a fallout remover. I don’t use Tar removers as usually they require wiping them afterwards, which I am personally not comfortable with. I have used Tar Removers in the past but never wiped it. On the few occasions that I used Tar remover I have simple sprayed it, let it dwell and then jet washed it.
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