I love the suggested "twists" to the art rules: Remember WBT is for YOU & the benefits of the Rules with the gestures is to "weave" them throughout your instruction so that your class will eventually be a "self-monitored" class.
I don't think there really is much you have to tweak for art class~ as long as you have a room of students with something to teach~ WBT can be your key to success for Classroom Management and Instructional Delivery!
*Most definitely check out the Big 7. The use of these tools will increase student engagement and their retention of information. Whatever you are teaching~ techniques, vocabulary, directions, etc. should be "chunked" into "micro~lectures" using the Teach! Okay! with mirrors and/or mirrors and words.
*I do not know if you get into Art History, but if you do, check out the "Brain Toys" as a means for higher levels of learning.
*Any vocabulary that you teach can be put into the "Power Pix" format~ Question/ Answer with an accompanying picture and gesture. For example, "What is a primary color?" could be an essential question, and the answer could be "Primary colors are a set of colors that can be combined to make a new color." Your gesture could be pointer fingers on each hand (those are the primary colors) standing up straight like the number one; then hook them together (when you say the word combined; then lay them on top of each other (when you say to make a new color)." Your picture could be a circle of red and circle of blue overlapping like a venn diagram with purple in the middle.
Of course you all are the art experts so I am sure that you can come up with better "Power Pix" ideas, but you get the idea.
Hope all this helps;)