mech IFR

You know, the type where you wet down your car, then use the scrub brush to get everyting, then rinse with the high pressure sprayer again. Sorry for such the n00b questions, but I've been doing this for the past year when I had the A4 and everything worked great if I followed with a good wax.

mpwolf

pretty harsh and can be damaging it not used properly. Also, you don't know what is in that brush. Finally, the high pressure water from the sprayer, while powerful, can also grind dirt into your paint if your car is really dirty.

If I were to use one, I would only use the water (no cleaner and make sure you spray it for a few seconds away from the car to make sure any cleaner left over from the last guy is gone) to get stuff like salt off in the winter. In the nice weather, there is no reason to use one, IMHO.

ex-quattro PETE

I use their water, but then bring my own soap bucket and wash mitt.

Troy H

Agreed, though they're great for cleaning fender wells and underbody after off-roading in the truck

Jeff Vader - boscoj

and get the wheel well and door jambs before I go home and wash it for a detail.

RKA

that said, a brush at a coin op car wash is murder on the paint. Try that with a black car, and you'll be in swirl city at the end of the first wash. Out here in the NE, I use a high pressure jet from a coin op car wash in the winter to remove salt and sand. I do not use the detergents...this is merely a pre-wash step. The remaining detailing is done by hand with plain old car wash soap and a wool wash mitt.

RickM

Like Raj says, I'll bet the silver has simply "hidden" the swirls which undoubtedly were inflicted.

TRed 2.7T

Make sure you never use the brush, you just don't know where they have been!

casperato

What wheels have you got and what are the 5 spoke wheels in your pics. Car looks great.

mech IFR

wheels on current s4: 19 BBS CHs, wheels from old stolen a4: Racing Hart 3piece C5s