Just curious, does “old school” pressure washing (i.e. just pressure, no chems) cause more issues with oxidation than housewashing/downstreaming chems with very light pressure?
I know they both can cause a mess afterwards if oxidation is bad, but just curious if the mess/aftermath is generally worse one way or another.
I guess what I’m asking, and it’s clearly a newbie question, is what makes more of a mess of oxidation; pressure or chemicals? Or does it depend?