After I replaced the green and blue channel and change to gray scale mode. Using big S curve to create high contrast. Clone out a few dust spot. Using FixerLabs focus fixer at 0.5 to get the maximum focus (this is a matter of taste, some may like to do it differently). Then I flatten it change to tiff 8 bit and to jpeg before posting. This is where I normally stop, but some of you who are more savvy in photoshop post processing may like to refine it further to your taste.