My cars were rough to the touch. I used this product and now the finish is smooth. It was very easy to use. I liked it so much that I used it on my three cars. The finish on all the cars now look and feel better than when the cars were new. Speaking of new... I purchased a 2016 GMC pickup and the finish felt rough from day one. I thought that there was something wrong with the paint, but I was mistaken. After using this product it is now smooth. Finally, a product that actually works.