Thank you so much for the comments on my canvas yesterday!
While making the canvas I was also creating a page in my journal. This page is glossy, while the canvas is more or less matte. I didn't have the "pouring medium" from the magazine article, so I experimented with gel medium instead. On the canvas I used Golden Heavy Medium Matte, mixed with a tiny amount of titanium white. On this journal page I used Liquitex Gloss Super Heavy Gel mixed with yellow paint, and then later on with white. When adding the white I happened to use more paint than I intended and I ended up covering more of the page than I had planned to (and I then went over the white with a yellow glaze). But I guess that's all part of the experimenting and learning. :)