The article linked to technical bulletin 27 "Remedies for Deteriorated or Damaged Modern Information Carriers" which linked to following publication: https://p

The article linked to technical bulletin 27 "Remedies for Deteriorated or Damaged Modern Information Carriers" which linked to following publication: https://publications.gc.ca/collections/collection_2016/pch/CH57-3-1-27-2005-eng.pdf https://publications.gc.ca/collections/collection_2016/pch/C... which contains remedy descriptions for damaged optical dics. I have had some success removing surface scratches with very fine sandpaper and buffering wheel on a drill press.