WD 40 doesn't fix scratches.
BUT as the cleaner of last resort!!
If you have a non-scratched record suffering with surface noise which
no amount of cleaning fixes, then....
Wipe the record with a clean paper cloth wetted with WD 40.
Then rinse the record under a tap, trying not to get the label wet.
Voila! I have a small number of charity shop records which are
now quiet and play well. WD 40 saved them from the rubbish tip.