I doubt it can be polished out. Even if it can it will be at the expense of the lens coating which will seriously affect image qualilty. I also doubt a replacement would be economical but you can get a quote from Fuji
here.
Note they have have refurb S602s in their Refurb Shop.
Slower reactions than a PinK Fairy - that'll take some living down....
As PF says, it may well be that the scratch will be thrown so far out of focus as to disappear in actual use.