Clay is used to remove contaminants from the paint. There are alternatives to using actual clay such as the speedy prep towel or nanoskin autoscrub wash mitt. Buffing is using a machine to polish the paint. There are generally three different types of product that you use with a...
IMHO even if you don't see a difference in appearance, topping the sealant with a wax will give you another sacrificial layer protecting your paint and making your sealant last longer.
When I first started using my PC, I had trouble keeping it rotating but with a little bit of use, I don't have a problem with it not rotating now. I think the PC just takes a little experience to get use to it.
This may seem like a stupid question but what is the benefit of using a glaze other than filling in swirls/scratches that weren't removed when correcting?
http://www.autogeekonline.net/forum/auto-detailing-101/61027-last-minute-stop-lowes.html?highlight=home+depot ....lots of good suggestions in this thread