@tomleico I know some folks don't like washes, but in this case I would say a wash with Mortarion Grime would work well. It's not a real dark or bright green and should give it some sickly green in the recesses. Alternatively if you're feeling brave, thin Plaguebearer Flesh contrast paint with contrast medium and do an all over glaze/filter. Either way, try them out on a test model first.
@Wrexphillips ooooh yes! Great idea. I have some mortarion grime so I'll try that. Like the idea of a thinned down plaguebearer flesh as well. Might test that out. Thanks 👍