I have seen many turners using black gesso. Not ever having heard of it before, I did some (albeit limited) due diligence. It appears to be not much more than an acrylic paint. Am I wrong? If this is correct, why not just use black acrylic paint? The stuff I have seen that have been 'black gesso'd' looks great and I'm ready to buy some of this stuff myself, but I am wondering why folks are using it, rather than any other black acrylic paint.