I had good results with hiring a "sandblast" team. Actually the abrasive they use looks like chopped up plastic cups (the thin kind). They took off the barrier coat as well - it was badly done by a prior owner and was the main reason for stripping it.
They covered the ground with tarps, draped tarps around the hull and went underneath WITH POSITIVE PRESSURE AIR HOODS and protective suits. It is a very toxic environment in there. But it keeps the state DEC happy (this is NY) and did an excellent job. However it was not cheap!!!
Last edited by gc; 10-13-2006 at 10:29 PM.