Left: Pentel Pocket Brush Pen sketch painted over with Schmincke gouache. On a piece of Hahnemühle Nostalgie paper that is approx. 8.5 x 11 inches. This is not paper meant for painting so it buckles a bit. I didn't have a weight on the sheet when I scanned it so there are shadowy areas at the left side because of buckling. Click on the image to view an enlargement.
Why paint on a paper that isn't "fit to paint on"?
Why not?! Most of the papers I use aren't meant to be painted on, but I do it anyway because they make great bookbinding papers, I love the way the various pens I use work on the papers, and I've worked out ways to paint on them (typically by using less water in my paint mix, but it also involves not trying to do the same types of washes and melding I might use on a paper sized for wet media).
That's what's going on here. I have a paper, Hahnemühle Nostalgie, that is super smooth and fun to sketch on. And yet sometimes I like to paint over my sketches. I have always enjoyed painting on plate bristol so this is just a slight departure from that. I modify the amount of water I use and then I make sure that I don't work and work and work in a wet area, roughing up the paper. I let areas dry before moving in again. You learn what a paper can take or not take and act accordingly.
Here's a Belgian Sheepdog I sketched from a TV show. I used a 2-inch wide flat brush to lay in some color over the whole head and wiped it around with a paper towel, then I started building up layers, going back in when the paper could take some more work. I used a #10 round for the build up layers.
Working this way made me eager to get out and sketch chickens (see my Project Friday Post from last week) in a similar vein. Because I was inside when sketching this dog and there was low humidity, the paint dried much more quickly. I was able to take this painting to a more complete finish, if somewhat loose approach.
Experiment with some different papers and see how you can adapt your painting approach to those papers. A paper meant for drawing might just be waiting to become your favorite painting paper.