thanks for the info . as far as the walls breathing im sure it would be better to strip all the paint down to plaster but if i put 2 to three coats of lime plaster over whats there would that not be ok .. i guess just this amount of covering would be breathable but wouldnt have the electostatic film that attracts dust like most modern paints but wouldnt be fully breathable with that barrier substrate. professionaly i would strip it in clients home given the same circumstances (having plasters walls like in my home) but i needed to test the binding capabilities over a regular painted surface with my concoction.hehe thanks for the link to kremerpigments website ill have to try theirs. ohh and i was reading about the magnesium marble , sounds interesting!