How so? Multiply layers or the line work? It's a little tricky to explain my process in words, but I usually have the line work with color holds on top and all other layers below that set on normal. As for lines, patience, haha.
Ah, thanks! I understand about the lines, heh heh. I'm not familiar with color holds though, let me look it up briefly ... Hm, interesting! So you basically color your lines on a layer, then color fill & background beneath them?