got a minute? i'm getting ready to put 3 more coats of Z2 on my car and i'm noticing that some water spots from earlier today(my fault had to babysit my son) seem to be through the previous zaino coats... in other words they don't wipe off and you can feel them with your fingernail.Z6 hides 'em but their still there.would you zaino over them? TIA answer quick please I'm gonna go rub some more.