In my opinion it starts with clay bar. You NEED to clean the surface. Once it's clean, I use Evercoat finish wax 100056. Goes on easy, comes off easy, looks amazing. 6 out of my 7 cars are garaged. My rainy day, train station, who cares where I park it, beater 95 Honda is 25 years old and it sits outside. NEVER garaged. Clay bar and Evercoat. Enough said.