Gary, Thanks so much for the tips. I plan to mix a little pigment with the 2nd coat of plaster and than use some lime wash to make the color uneven. But about the cement bonder. While researching it, I came across this product "Plaster Wels" from Larsen's (www.larsenproducts.com/plasterweld.htm). They call it a liquid lathe, and it is supposed to make plaster stick to anything, including drywall. Reading the instructions on the can, you are supposed to let it dry before applying the plaster. Are you familiar with this product, or is there a brand of Cement bonder that you could recommend.