How to remove red patches of skin in GIMP?!

[Krikor]

Browsing at random (on the fly?) I found the following question in another forum about Gimp: https://www.reddit.com/r/GIMP/comments/r...&context=3

Quote:"I want it exactly as you see in this 1 minute photoshop tutorial; https://www.youtube.com/watch?v=xJLF4VuJHQA

However there is no dropper selector for hue/saturation adjustment with GIMP. How would I best go about it with GIMP??"

In the comments, Master Pat David promptly indicated the solution https://patdavid.net/2014/07/wavelet-dec...%20Removal,- what%20if%20the

But I decided to try using an approximation similar to the one used in the video, using a hue-saturation adjustment.

Here I detail my approach and the result obtained:

Initial Image
01- 

Selection of the area to be changed
02-

Adjust in Colors - Hue-Saturation... and used layer mask

With the mask selected, I made the path to selection and applied a feather of 20. Then with a brush at 30% opacity I brushed on the mask until I got something satisfactory.
03-

Result
04-

The result obtained here serves only as a reference, since both the selection and the adjustments were made just for the sake of experimentation.