[Accumulator]

Originally Posted by Denzil

.. the SV brushes are a little more stiff and more consistent/dense.

I'll repeat my usual caveat about using brushes that're *too* stiff and/or synthetic-bristle brushes, even those with flagged tips (the flagging wears away).

I know most people don't worry about micromarring SUV/truck wheels and nobody seems to have the problems I encountered with the flagging wearing down, but having had to refinish expensive wheels from using "pefectly safe!" wheel brushes I'd rather err on the side of caution.

Those natural-bristle brushes are, IMO, the way to go.

what would that..[soft, natural-bristle cylindrical] brush be used for? wheels/lugnuts or interior?

Besides the lugnuts/etc. I use brushes like that to clean the painted areas in wheelwells, inside door/trunk jambs, under the hood, and inside the fuel-filler pocket. Natural bristles are both gentle (once they're wet) and free-rinsing; I use 'em for cleaning all sorts of out-of-the-way areas.