Bondago is one of the best primers on the market. This product will adhere to just about anything and can also be your base paint as well. Eliminate a step and prime and paint all in one.
Also, the Bondago Clear allows you to prime your natural woods so that you can do a wet distress and expose the original color/wood.
Metallic Mica Powders are fabulous to add to other mediums, like a glaze, Gel Medium, Crystal Clear Crackle and just about any clear medium.