Here's the Turtle Wax lens restoration kit I mentioned earlier. It is a wet sander but is manual (no power drill involved) but it includes a sealant.
Turtle Wax T-240KT Headlight Lens Restorer Kit https://www.amazon.com/dp/B001TI5IIQ/ref=cm_sw_r_awd_XYVrvb0XEGY7T
Amazon.com: Turtle Wax T-240KT Headlight Lens Restorer Kit: Automotive