On-the-fly color mixing (with CH Studio paints):
Sky Blue + Purple Palette = a really lovely cornflower-ish color
Smidge of Blue + Dab of Yellow + Pastel Yellow = a nice forest green
(I discovered the latter because I tried the first two - that is, Smidge of Blue and Dab of Yellow, which is a darker golden-yellow - and thought the resulting color was too dark. So I thought "Add more yellow!" and when I reached for the yellow I picked up the pastel yellow instead of the darker one. But I like the color I came out with a lot, so I wanted to remember what it was that I did.)
I just tried Claudine's "glazed paper resist" and it came out absolutely gorgeous. This uses Bazzill glazed cardstock painted very very lightly with a sponge (I used these). The glazed portions act as a resist. I'll post a picture when I have one.
I do have one picture to share - I'm two weeks behind on the class projects which means I'm just now working on the grid project. Here's what I had as of yesterday:
embossed paper, done in a similar way to the glazed cardstock technique, with a sponge. The color is Smidge of Blue (which is very dark in the bottle but lightens up nicely, as you can see). I would really like to have been able to get the color to go on a little more evenly, but on the other hand I think the mottled blue looks pretty cool, too. I imagine getting it more even is partly a matter of practice.
The other three squares, going clockwise, are stencilled, embossed with amethyst PearlLustre and Perfect Pearls, and photo-tinted. The dark green on the stencilled one is the mixed color I was describing above, and the lighter green is Claudine's Landscape Green. I have never really stencilled anything in my life so I thought this came out really well for a first try!