Hi Alfredo,
I'm not even sure it's possible to do what you're asking but it's certainly not a trivial operation. I'm certainly clueless on how to do that, sorry. The trouble is that the artifacts have very smooth transitions from faint to bright which makes them difficult to detect. They look just like DSO's.
Hopefully someone else will have a suggestion but when I run into situations like this like with my hyperstar I try to address it at the source, not in post processing.
Welcome to this forum and PI!