I just washed and spray waxed last night and my black car was all clean. Today what do you know i went out, it was sunny and for 5 min or so it was pooring rain. I was like awww sh!t that was a waste. This is def a part time job to keep black clean with no water spots. Also what will save me time that people were talking about on this board is a leaf blower. Im getting that one at walmart because I hate when i wipe the car down and there is still water dripping out in the cracks (lights, trunk, grill).