Ok I managed to sort it....funnily enough by hand...no rotary, no wet vac, no honing powder. Brushed on the stripper which is bostik tile renew a replacement for lithofin wax off i am told. While it was mid way through evaporation i agitated the tiles with a white nylon pad by hand. The soft sealer transmitted straight on to the dry pad leaving a beautiful slate surface...There is no way any wet vac could have extracted this stuff off. I think it could have been polyurethane but not sure. Big lesson leanrned with this one...thanks to all for advice.
William