I like using the Nitrate on the structure, then attach the cloth with nitrate around the edges. Once dry, I shrivk with a heat gun, then I fill the weave with Nitrate as well. Once the weave is filled, you have lots of options, you can fill the weave completely, then paint for a nice smooth surface, or not and keep the weave for a nice scale look.
If you want to keep the weave look, then just apply the colored butyrate over the nitrate for whatever design you choose. From what I understand, butyrate tends to weigh a little less than paint. I may be trying it on my next plane, we'll see.

Patriot