i remember reading some experimental entries about alternative materials/sustances like the stuff from diapers as thickener and strenghtener. i tried already the diaper-thing and it worked out well. it's just hard to grind and i did not get a nice surface out of it. now i wanted to use silica. i read that one type of cat litter (crystal litter) is infect silca gel. did anybody use that yet? is it the same?
thanks for participating