Thanks for the update.....how many hours do you have in it - how long did it take to do the sanding disc part and how long with the slurry? (and what kind of area were you covering?)
I did have a go a few years back on my side windows which are scratched from going up and down. I used some cerium oxide (jewellers rouge) and also tried cutting compound (which some have used with success), and did not seem to see any progress. I moved on to other things but still need to come back to these eventually, hence my interest!