I just did mine with extra fine steel wool, followed by polishing compound, followed by a coat of wax. I won't say they're as good as new, but they're much better than they were before I started. I was able to remove all of the yellowing, but they still aren't crystal clear.
95 Contour Zetec, ATX (wrecked, sitting in the barn)
95 Mystique Zetec, MTX
2000 Taurus SEL 3.0L Duratec
1994 Crown Victoria LX 4.6 V8
1993 Chevy Silverado 4.3 V6
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