Random question about oxidation

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?

On oxidized vinyl and aluminum…Pressure bad… Chems good…

Type in oxidation removal in the search bar. You’ll find your answer pretty quickly.