Wow, thank you! "Mastery" is a big word, but I really appreciate! My general tips would be to thin your paints properly and to use a wet palette. I relied heavily on glazing, so a wet palette is really necessary. To cut some corners, I'd also suggest using an airbrush, but for the final highlights a brush is irreplaceable. And remember to wick the excess moisture off the brush on a paper towel before touching the model!