If I just want a very light coating, then I spray a little BnB from a small 2 ounce cosmetic mister onto the foam brush. If I want a thicker and glossier coating, then I squeeze BnB from a yorker capped bottle onto the foam brush. When using that method, you have to squeeze slowly along a straight line and give the foam time to soak up the product. Otherwise, it will just run right off the brush.