Recently I tried to save a clear resin canopy.
It had quite deep scratches I did not manage to erase with sanding/polishing option only.
I tried Future/klir dipping with not real success.
Then i bought AK gauzy glass coat. It filled the scratches and gave a nice finish.
But It has left some bubbles or dust.
I managed to erase them by polishing with tamiya compound.
And then, i applied the Tamiya modelling wax:
This product is excellent.
Now my canopy is saved, and shiny!