The product is easy to use. It did not remove the black streaks from my motorhome described in the product advertisement. But nothing I've used up to this point hasn't done either. Currently three stars. I'm going to try it on my wheels and tires on both my van and cars to see how it fares there. Updated after trying on rims and tires. Hope it works better for this app. Updated rating. When I emailed Brian he said it looked like spots, not streaks. He is very helpful and is sending a sample of another product this week to see if it helps solve my problem. Great seller a pleasure to work with