OK.. .I bought the Porter Cable 7424... I used it for the first time yesterday on my hood that was painted about 9 months ago. I applied McGuire's Paint Cleaner as step 1.. It was a PAIN IN THE A$# to buff out by hand and by machine. Then I went to Step 2, "Polish"... I applied that with the buffer using the polishing pad. I worked it into the paint pretty damn good on speed setting 6. Then I took a micro fiber towel to buff out the polish and the towel would actually get stuck to the dried polish on the paint. My hand kept slipping off the towel. I did finally buff off the polish, but am definately not impressed with the outcome. Could it be because I left the polish in my garage all winter? Could the chemicals have seperated? Is it my paint? Or, do I just not know how to polish my car?????