Accumulator said:[Note: FWIW, Accumulator used Sea Sponges for years before switching to BHBs and mitts.]
Same 'ol same 'ol: you simply *gotta* CD-test any wash/dry media before you touch automotive paint with it or you may be in for unpleasant surprises. No, the test sure isn't perfect, but it beats experimenting on irreplaceable clearcoat.
detaildoc- Nice save, you did a great job of getting the finish looking good again.
One thing I noticed from the before pic- your marring is of considerable length, looks like some of the scratches are a few inches long. Since a short scratch doesn't show as badly as a longer one, I always recommend that people wash in short, interrupted "jiggling" motions. Not only will this ensure that any marring that *does* occur will be comprised of little scratches, but the interruptions will also provide a pause during which contamination can be flushed away so it doesn't mar in the first place. Just my $0.02...
I should have done the CD test, but I guess I thought it would be alright, man did I learn my lesson. Good observation about the length of the scratches, that is exactly what I noticed, that many of them were very long. Your suggestion to wash in short interrupted motions is a good one, which I will definitely put into practice. Thanks