What does claying actually do for the car? As you no doubt know for yourself, black (or dark) cars always show the blotches in direct bright sunlight. Put the car in the shade and it looks beautiful, but the sun reveals all (swirls included) The kind of thing that's left behind if you rince the car but don't chammy it immediately, then you get those horrible blotches that are difficult to get out. Does claying prevent that? Also, does it make a huge difference when you polish it after claying compared to a normal polish without claying? And finally, is claying something that shouldn't be done too often? In other words is it mildly abrasive?
