Not sure why I could not find my prior post on a foggy (very foggy) rear soft top window. But ive spent several days on making it so I can see through it and with some great advice on here I have got it to work and the the procedure is the same as for wet sanding paint and it works! I will post a pic tomorrow but basically its the following process.
wet sand with 400/320 grit. 2 passes. (you will need 3m or similar 2 quarter sheets of paper and some washing up liquid)
wet sand with 600 grit. 2 passes
wet sand with 800 grit 2 passes.
wet sand with 1000 grit 2 passes.
wet sand with 1500 grit 2 passes.
wet sand with 2000 grit 2 passes
wet sand with Trizac 3000 2 passes.
use Migruires Plastice polish for headlight.