Before but 3M Imperial glaze should be applied /w a rotary for best results, a PC will work if you work it in long enough, you want to make heat w/ the pad so it will work right, and then lightly use a lower setting /w light pressure to give it a nice shine. If you don't have a machine use hand glaze, Read the instructions on the bottle. You don’t want to use a sealer or wax “cleaner� after you have glazed because it will remove the glaze or make it hazy. Think about claying first and polishing before you glaze for much better results. Glaze is exactly what it means glaze like you put glaze on a cake to make it look nice and shiny and this type of glaze will bring oils back into the paint, especially SS paint. There is a lot more things to know about applying glaze and the many type of glazes out there for different type of paint you are working on. If I was you I would say what kind of car you have year color and maybe a pic and what kind of defects you have on your car and others here will tell you the proper procedures to follow to detail your car right.