I'm trying to get that effect, but the masking fluid comes off with paper... I've tried applying it thick, thin and watered down with water, but still when I peel it off, the paper uderneath it is mostly white... Can you help me with advice? Is my paper too thick or something?
No~ That happened to me a lot too. Some papers like Arches have a stronger surface and will not rip as easily and will absorb more colour so it might work better. In the end I stopped using masking fluid.