Hi.. I love S&W and use it a lot. My question is.. does S&W clean and then kind of leave a "seal" over the paint again or does it simply clean and remove the dirt and leave no residue behind. The reason I ask is that my paint always feels so smooth and glossy after S&W, almost too smooth to be just a cleaner. If S&W does leave behind a coating of some sort, am I safe to put a sealant over it? Or should I do an actual car wash (good old soap and water) before putting another layer of sealant on? I did a search but did not see this asked anywhere. Thanks!