I did notice a slight difference. The reason I'm saying it was waste of time for me was because of the time it took for such a small difference. I was hoping it would take care of a couple water spots I had on the hood from the washer nozzles but it didn't do a thing.

I did start off in small 1' x 1' sections but after taking forever on one section of the hood I gave up (got frustrated ) and just dedicated the clay bar to the front bumper and just skipped to the paint cleaner. Kind wished I had picked up the Meguair's (or some type) polish to really bring out the color.