In the program I have 'Gimp', I have with it the plugin GMIC-qt. Two of the filters are Moire' removal and Descreen.
I had a photo the other day where I could not remove the moire and tried something different using noise/spread then denoise.Removed most of it.
Original
After.
Also with other things done to it that I normally would do.
After. Also with other things done to it that I normally would do.