btw? what cleaning program are you using? There is a difference between cleaning DNR and actually cleaning dirt specs.
In the past DNR was used in a lost of restorations (even Bluray) but in order to keep the GRAIN I was wondering what filter you were using.
I have used Image clean-up before but not for noise for Dust & Scratches only.
Reducing noise creates softness and loss of sharpness and definition.
see the Star Wars new Blurays.
Thanks