If you have put a good coat of wax and a paint sealant, then it is advisable to use detail spray after every wash such as Allbrite's Show Shine or Extra Slick Show Shine. Use of Show Shine will help to maintain good shine and replenish thin coat of wax and silicone protection. Then use a wax or a glaze, such as Allbrite's Fast Finish or Fast Glaze or Clear Coat Wax every 3 month to add more shine to your car.