the car in front of me had a brush wash up before going into the carwash itself along with a power wash. i got the power wash but did not get the brush wash down. how does one go about getting this done to your car?

That is for areas of. Your car that are recessed, or blocked by the rotating brushes. Also if your car is particularly dirty. Like winter grime. If the car comes out clean the goal is reached :)

The employees do it themselves. 99% of the time they do it. They prolly thought you wouldnt know the difference.