Stop in for a cup of coffee

someone else told me that as well and I didn't get that ......if the surface is not perfect then why put paint on it of any color.

but I think I get the part of black showing water marks and more stuff that lands on it.

No surface is perfect. Just some are better than others. Its all a matter of how close you look. puting a deep, dark, high gloss finish just acts like a magnifier.