High Wing Drifter, I know that red chinagraphs will permenantly stain the plastic red so they really aren't a good idea, I think the blue ones are the same so i'd really steer clear of them - especially on an expensive new CFP-5.
Good point. However, black, the only colour I use, is fine..perfect for the job in fact
Even if you do use red, meths will sort the problem, but then you are back at square one I guess.