To keep your paint looking great, all you need is a car wax pre-cleaner, and a good car wax. Wash your car with Dawn dish soap (or any other dish soap), dry it, apply the pre-cleaner, and then apply the car wax and you are good to go. Everybody here believes in their own products. vlad strongly believes in P21S, he says it's the best stuff he has ever used and I trust him strongly on that. The only downside to P21S is that it only lasts for 6-8 weeks (6 weeks on average) and it's not cheap. Meguiar's Gold Class is a really good, more affordable, car wax. Personally, I use Liquid Glass Auto Polish and I am very happy with it. I am getting great results with the stuff and it is rated to last for 6-12 months depending on the conditions.