I decided to do a tutorial about liquid mask after many people asked me how to use it. At first I thought it was easy, just apply it with a brush, colour over it and when dry remove it with fingers, but actually there are plenty of things you should care and be aware of and none of the tutorial I saw actually talks about these sort of things. Masking fluid is right now the most powerful tool a watercolour artist has available, of course beside the watercolour and a sable brush! You can do wonderful things with it if you just try and if you're careful about few things...
The pic I've used for this tutorial features Ian Curtis (Lead singer of Joy Division) and here's the final deviation:
pics I did using masking fluid:
[link] <-- Stina Persson is a fashion illustrator who uses liquid mask A LOT. Check her website, is amazing.
Oh, I just have one question: Can I use masking fluid on colored part? For example, I draw a girl, color her hair with watercolours (let them dry) and apply masking fluid on hair, to protect them? Is it possible (without ruining)?
uhm, you should best avoid it. It doesn't really tear the paper if the color is completely dry but it will remove a bit of pigment so the color will be lighter once you've removed the masking fluid. Unless that's not a problem.
Paper tore - 3 hours of work hit the fan...
:-/