Mmmm, I'd need to see a render of the "blotchyness" to comment. If the texturemap is "non-human", then I'd say a few tweaks would be needed to get good results. Both the spots and sss use that fact that human skin already has some redness in it to get the results. If you use the script (or nodes) on a "green shimy skinned monster from the deap" - then I wouldn't have thought the results would be quite right! As a startingpoint - turn the spots off - if the blotches are still there - then it is something else.

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