I used this on my truck which had very yellow headligts from being in the sun for over 10 years. I used a cordless drill with attachment and this polish and my headlights are now crystal clear. Very impressed and it took less than 10 minutes. I tried using this on the plastic covering over my speedometer and gauges etc but the results were less than favorable. This is probably because that plastic was flimsy and hart to push hard enough to get the polish to do its thing so most likely not the fault of the polish. It was just hard to get into that small space and really buff it out..