With a mitt, I always had a good intention to gently glide the mitt, but human nature takes over after the first pass and there I am, scrubbing the dirt over the paint.
With a BHB, pressure bends or flexes the long bristles and since they are about 4" long they agitate the dirt instead of pushing it.
I have black cars so I need every advantage there is to avoid swirls, etc.
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