I'm working on the final details of my two dark skies watercolours. I've been experimenting with how to paint the lampposts which are part of the landscape. In my previous attempts, I actually drew them with a waterproof marker. But this time, my plan is to paint them with a fine brush, so they are better integrated in the overall look. After a few freehand failures, I found a tip in Artists and Illustrators magazine on how to hold a ruler so that you can paint a straight line without smudging watercolour over the paper. The trick is to hold the ruler steadily with one hand, but to hold it at about a 45-degree angle, and to lean the metal part of the brush against the ruler. I found that drawing from the bottom up worked better for me. Very important is to do a few trials on a paper similar to that of the painting - no point in trying it out on smooth paper if the painting is on rough paper.