i believe the new brush and dangling squeegee car washes are sight less aggressive than the  bristle brush type that run down
the sides and up over the top from the 70's and 80's.

And I can assure you, those old style, were a lot more aggressive. When they come into contact with a 65 ford pasture truck and encounter a rusty old box containing dirt laden post auger, spade, several empty tall boys and a slew of rusty and new tail ends of high tinsel barbwire.
They make one he!! of a racket, plus, are able to disperse mud to places you need a ladder to reach.
They also make a dandy wire winder :)

BTW, it was educational,,,,,I learned some new words to use sorting cattle (or loading hogs).

THEM BOYS WERE PIZZED!!!! 
and I was banned :(

.