Here’s something i’ve just had a go at- doing the line art and watercolour rendering separately and then combining them in photoshop, to get round the problem of keeping nice black lines on hand coloured work. i did it by scanning in the line art, then printing it out in light blue, painting over the print and scanning that back in. i think it looks ok, and i can iron out the issues with the ghosting of the line and the wrinklyness at the same time by using thicker paper. not sure i’ll use it all the time, especially on full strips, but it may come in useful at some point. if i was being really wanky, i could do a really thin line art, then print and colour, then draw thick line art over the thin lines and rescan.