Started the Ralph Lauren "Denim" technique and I am having some difficulty. The top and other areas where the glaze has to be applied with a brush looks quite a bit different than the rest. Any ideas? Also, anyone know the best/easiest way to fix a portion of wall that didn't turn out very good? Didn't know what would happen if I just glazed over it again. This is quite a bit harder than it appeared at the Home Depot class I attended.