For whitening white leathers, sometimes I find that the magic eraser works very well to remove the marks from the surfaces. When it ends up removing the colour though, this will work in a pinch. It does not appear to be completely waterproof, but it seems to stay in place during normal wear and tear. It does need a little bit of effort to blend it in, but it will make leathers look better than before. For more permanence, the scuff cover might be better.
These reviews are the subjective opinions of ChickAdvisor members and not of ChickAdvisor Inc.