This is ok to do once in awhile but dont do it often. The dish soap strips all the wax and dries out the rubber seals and weather stripping.
when you apply wax over more wax you are removing the first layer and replacing it with the second. You really cant put 2 coats of wax on a car. However if its a paint sealant or synthetic wax you can do multiple coats. Read the directions because you need to wait a certain ammount of time to do it. Most are 20-30 minutes to haze, wipe off and wait 20-30 minutes to apply.
Another thing is that wax is a protectant. Its not made to add shine. Thats done by polishing. If your looking for a real deep shine buy a D/A buffer and polish the paint with some Meguiars 205 and a white pad then follow that up with your favorite wax.
Ive got tons of wax at the shop Meguiars Tech wax, Colonite, Chemical Guys butter wax are what we use them most usually depending on the level of the detail and the color of the car.
