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Pol as a pre wash, you sure ha ha?.
I use the very strong Autosmart tfr in work, just have to be careful not to leave it dry or sit on trim (silver)
A safe bet for me is touchless.
Always pre wash especially if it's not been cleaned for a while.
If you have a foam lance touchless is very good. Can be used equally in a pump sprayer.
I'm personally not a fan of using an apc.