
I ordered a regular pen and a 'superfine' nib as well (shown at left on the picture above). It certainly pays to experiment with it before launching into a painting. It takes a little while to get used to having a bottle attached to the pen, but the applicator is long enough for you to hold comfortably and draw. The fluid is thinner than normal masking fluid (and blue) - more like the consistency of thick ink. As the flow is dictated by gravity, you need to adjust the angle and speed that you work or you will get 'globs'. The regular nib is shown at the top of this doodle, and the superfine nib at the bottom.

It is quite fun to work with, and I can see how it would be useful for craftwork too. The results were pretty good and there is no question it will be helpful for things like whiskers, leaf veins, grasses etc - infact anywhere that you need a fairly precise thin line that you can control. Of course if it didn't go on right, you can just wait for it to dry and remove it in the usual way.
I think it will pay to mess about with it some more, but my first impression is very good and I will be using it again. Whether you need the superfine nib as well will depend on how fine you want your lines. It does what it says, no mess and no fuss - and no more ruined brushes.

