Well I did one repro on one panel after seeing Colin's version. Went back to basics with Tom's tutorial. Here's a
link to it. It's quite old from 2009 but still relevant. [10MB PDF download]
Big one
here [6.3MB - 2939x1930]
HD version
here [3MB - 1920x1261]
I reckon the colors are more vibrant and it brought out a bit of the brown stuff too.