Before the fingerprints, MS-62, Proof-Like. After the fingerprints, MS-60, P-L. If the fingerprints were addressed early, something could have been done. Now, nothing is possible.
Ehhhh, you could dip the coin and almost certainly remove the fingerprints. BUT - it depends on how deeply they are etched into the surface. Typically, it's shallow enough that dip will remove them.
I'll bet that they are etched into the surface and that a shadow of them will remain. It does not take much for something to show on a Proof or P-L coin. That one of the reasons why I don't like most P-L coins.