Mmm not a good move there Bobert, obviously they're plastic. Rubbing gently with metal polish will remove some of the scratches, but I do mean gently, and with a circular motion and a lint free cloth. DuraGlit or Brasso is what I use for my watch 'glass', the wadding in DuraGlit is pretty soft.
Just be carefull, do it gently, and keep cleaning it off and checking that you're not being too rough.
It won't remove them totally unless they are very lightly marked, you'll just have to do the best you can.
You could 'lose' them and claim the insurance!
Giok