I have used Norton's spray detailer with success, available at many auto body shop supplier retailers. Since then a friend suggested I make my own as he had, he is a professional detailer.
Get a good quality spray bottle, you can use tap or distilled water, add .5-1.0 ounce of soap (your car wash detergent, or an alkali dish soap like dawn especially if you want to remove old wax). Get a good quality clay bar, and go at it. Don't be stingy with the lube and only work the clay bar back and forth, never in a circular motion.
The spray bottle I have pumps up and gets pressurized, delivers a nice frothy stream of the lubricant, don't know where it came from, got it from my buddy. If you go with the soap route, you just may have to rinse the car afterwards.
Hope this helps. Take the money you save and buy a good product to protect the nice clean smooth surface you now have.