trl2112 said:
I have one, but rarely use it. Mostly on visiting cars.
Gears said:
Yeah, a CWB works great until it gets you, and sooner or later it will.
Same here; I voted "used it a few times...". Actually, I used it for quite a while, especially back when I had the Volvo wagon. Finally quit when a) I got marring from it despite my efforts to avoid it and b) I got rid of the Volvo, all our current vehicles are too nice to risk marring like that.
I was a pretty staunch defender of the CWB for quite a while, and some of the posts on this thread reminded me of things that *I* used to say. So, just for the sake of discussion:
Sergie said:
How does a scratch happen when using the blade? There shouldn't be anything on the paint. Of course I am talking about a car that didn't go through a mud field, just a normal dirty car.
Regulars here will confirm that I'm about as meticulous as people get when it comes to washing a vehicle. I can honestly say that I get things as clean as I can imagine *anybody* could do. I always assumed that I could wash well enough that the CWB wouldn't cause problems... but nope- a tiny speck of something abrasive somehow got between it blade and the paint and caused marring. This happened maybe three-five times out of many dozens of washes, but it was enough for me (and more than I get now that I've retired the blade).
junebug said:
I don't understand how a soft piece of rubber can scratch paint - unless there was dirt or a grain of sand on the paint to start with, and in that case, anything - MF, WW towel etc would scratch it.
Yeah, any marring will come from abrasive [stuff] getting caught between the CWB and the paint and then getting moved. Though I wouldn't bet my life that the blade itself couldn't (at least under some weird usage but hey [stuff] happens) mar very soft paint like black lacquer.
Some drying media (namely *plush* towels) will have enough nap that some contamination will get caught up and thus won't mar the paint (at least if you're lucky). And the "pockets" of a WW can provide a little of this type of insurance too, at least more than the CWB- if something's caught between the blade and the paint it'll scratch, there's simply no margin for error. It's direct pressure between the blade and the paint.
People with infinite patience will sometimes dry a vehicle by blotting. That's gonna be less risky than wiping with *anything*, but wiping with something soft and plush will always be safer than wiping with something firm with nowhere for the dirt to migrate away from the paint. And with a towel you can easily adjust the amount of pressure being applied to where you're barely touching the paint at all, whereas the CWB requires a certain amount of pressure to stay in proper/effective contact with the paint.
Note that the instinctive thing to do with a CWB is to make a long pass with it; if something gets caught between the CWB and the paint you'll thus get a pretty long scratch. I never move my WWs/other drying media in such long strokes, so even if I do get that contamination between the paint and the drying media, it won't result in a *long* scratch. Wiping it between swipes only prevents contamination from scratching more than once- from the second the blade picks something up, you'll get marring until you lift it off the paint or quit moving it.
BTW, this is why I never make long passes with my *wash* media either, I jiggle the BHB/mitt across the surface so that the length of any marring is minimized (a 1/4" scratch isn't nearly as obvious as a 4" one).