I have an Inflatable dinghy that was in the water all season, with very littleuse. When I beached it yesterday, the bottome was COVERED with thousands of Zebra mussles. I scraped them off as best I could and washed/scrubbed it, but it still has lots of remnants of their being there.What can I use to thoroughly clean the bottom? I've been told muriatic acid will work, but I'd hate to ruin it with such a strong solution.Also, any ideas on painting the bottom? VC-17, maybe?