Thought I'd share my experience.
I've had a number of cars with headlights I've restored and I've tried numerous methods... including the usual sanding with finer and finer grades of sandpaper, using a cutting compound, then polishing. Generally, it's a fairly time consuming process.
Recently, when I got my E53, I couldn't be bothered with all those steps and hard work, so I thought I'd try something different.
I masked up my lights to protect the paint and got out my rotary buffer.
With the buffer on the highest speed, I used a pad and cutting compound for about 10 mins a side (being careful not to burn the plastic).
I then put on a different pad, this time using a polish and spend 5 mins a side. I then waxed them and put a UV protectant on.
My headlights were far worse than 'Crowz' and they honestly look brand new now.
The whole process probably took 1/2 hour, with no physical work other than holding the rotary buffer.
Would definitely recommend!
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