My white (porcelain?) sink gets silvery scratch marks in it very easily. The first time I cleaned it I used soft scrub w/ bleach and they came off, but since then I haven't been able to remove them 100%. As it is I use so much of the stuff I have a hard time getting it all rinsed off. This sink seems high maintenance to me.
What causes these marks? Have any of you had any luck keeping them at bay or getting rid of them more easily?