Well, these dyes should be removable somehow even if you need an acid or base solution to get them moving. They dissolve readily in water, acid or base.

OTOH, just like drying spots, if the film is not wetted evenly from the very start,there may be marks. You can get permanent marks just by placing a drop of water on dry processed film. The spot is not easily removed. Rewetting the entire negative, then drying after use of photo flo might help.