Years ago, the standard meguires detail products were sold in a three step process: step 1, paint cleaner, step 2, polish, and step 3, wax. I still have paint cleaner and polish from those days and I imagine are at least 5 or so years old. Are they still effective and okay to use?
Also, if I use clay, is it still necessary to use the step 1 paint cleaner?
Lastly, can I buff polish by hand or is it necessary to use an electric buffer?