I dont need to understand how Laserdiscs work at an RF level and to say at all, is a little bit bitchy, dont you think?
As i wrote before, the method is nice, if you have multiple copies of a LD. If you have only one, then you can either try to capture that disc multiple times and/or with other hardware-players, in the hope to get rid of the dropouts or you will need (post) effects to remove dropouts.
I dont know how a finished dump will look like, but i assume that the video-content can be viewed/altered/processed, without destroying something. Otherwise you only would be able to capture something and would not be able to replace frames, create entirely new content etc. and AFAIK this should be possible with a LD dump or at least with Domesday´s ld-decode. I apologize if i am wrong here.
Post-production effects should only be applied if nothing else does it better and after all work is done. On a finished dump so to say and i dont see why they should not work.
If the software-player (for the LD dumps) is intelligent enough, you could have a extra track, just for the postprocessed frames and that just for the case, you get another LD of your original LD to further improve the dump on the dropouts. That is what i think, would be a good method, because it is non-destructive and improves the content quality by removing dropouts, even on a single source.