I was able to use some of my favorite materials which include NeoColor II watercolor crayons and Posca Pens. If you haven't tried either of these materials, they are well worth the investment. Posca Pens are a little hard to come by, but can be ordered on Amazon. I have two sets, one which I recently ordered that are extra fine tip and another that are medium tip. Both sets are amazing and have incredible ink flow.
While I was browsing for new supplies, I was hoping to find a white gel pen that would write over watercolors/acrylics/etc. and actually work. I've tried multiple pens without success until I came across the Uniball Signo. Wow. Very nice pen with fluid ink that nicely works over a variety of surfaces (at least the few I've tried so far). I ordered a pack of three with a variety of colors (white, gold, silver). Amazon has many different options for whatever you might prefer.
After finishing the above lesson, I started the sketching portion of another lesson by Tamara. After much erasing, editing, re-sketching, I think I am ready to add some paint. I'm taking a few pictures of the work as it comes along from the beginning to the finished product.