new to the site and seeking thoughts and advice. I generally go back and forth from glazing to painting my "art" pieces of high fire white or brown clay. I recenetly did a number of nesting vessels that I intend to leave rough white bisque ware.BUT I am wondering how best to seal them if at all, to keep them pure white. perhaps only seal the flat bottoms. they feel slightly rough to the touch from some peoples comments however that is part of the design. Is there a way thru sealant, paint, or whatever to close the porous cells and keep it from discoloring ?