Quote Originally Posted by Poisson Du Jour View Post
damaged threads on the lens side will damage the lens threads; frontal filter thread damage is by and large inconsequential, perhaps not allowing a hood to be attached (unless a clasp type)
An alternative to trying to de-bend a threaded ring or to re-cut a damaged thread is to simply mill-off that damaged part. Would not look nice but most probably will come out as the technically better working solution.