I agree with you on that but I feel like during the dwell/ rinse off process you have that lubrication on the panel so you are potentially not causing marring when taking the pressure washer to a dry surface and potentially loose dirt/ debris is flying across the paint with no lubrication? I definitely have not used any snow foam soap that makes any significant dent in traffic film which I find to be the biggest pain especially on white cars where its baked on for months.
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