Interesting about the Cascade, I’m surprised I’ve never heard of using it like that before.
Like he said, avoid the sun like the plague.
If you wash often, you could try switching to a “rinseless wash”.
I switched to doing rinseless washes when I started detailing because I hated chasing my tail trying to constantly keep the vehicle wet to avoid water spots.
I’ve started using traditional soaps again, but I think I’m going to go back to rinseless for doing dark vehicles in the sun.
Sad thing is that nice clean protected paint beads water, and hard water and beading creates spots.
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