Ok, here is my first attempt at narrow band colour processing which I offer for critique. Object is IC2872_Gum39 in Ha/OIII/SII. Not quite up to the standard set by MnT in a recent post on this image but I'm ok enough with this one to put it out there. Many thanks to Rick S for providing guidance in response to my post on narrow band processing.
About 18 hours of data all up. I used the Ha channel as luminance and fiddled around with dozens of palette combination in PI pixelmath. I had to stop doing it as it was driving me nutty
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Equipment is a TSA120 OTA, QSI683 and Astronomik 12nm filters.
Link to astrobin image is here.