This is what I've been doing, and for those very reasons.Use ICE wax and you will not have any residue along the edges. Your black trim will also look great.
I have had some success with maguires quik wax, the spray on show wax. I'm at work and dont remember exactly the name, but it gets rid of the waterspots for me no problem. Whatever you do, DO NOT buff the stripes, that is not good for them.I get really bad waterspots on mine...wax doesnt seem to help
Anyone got a 'cleaning' solution specific to this material?