I thought I post my experience with my Mothers Powerball Headlight Restoration Kit.
My Civic headlight lens were foggy. I tried using Turtle Wax polishing compound by hand previously but my hand got tired of the rubbing and it wasn't very exciting. I saw Mothers was on sale this week at Canadian Tire. So I bought the kit for $22.39.

It comes with a sponge powerball, polish, microfiber cloth and 2 sanding pad of various grit for the more damaged lens. They recommend you protect your car paint with masking tape. With the powerball attached my cordless drill I went to work. I applied a nickel size of polish on the ball and did a small section at a time. Using the powerball was a breeze compared to rubbing by hand. I think I spent about half-hour from start to finish.
Right side:

Left side:
I used Turtle Wax polish previously on the left lens so it wasn't as bad as the right side.

