Try out Zaino show car polish.
www.zainobros.com
It will outlast any store-bought wax or polish. It is the easiest to use and comes off smoothly with no residue. I used meguires 3 step and gold class for years but have now switched to zaino. Try it out!!
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91 GT AOD: 3.73's, Pulleys,PI Converter, 14.71@91.78mph
(before pulleys)