slimy grimy works great but yeah, don't breathe it in, don't get it in your eyes, etc. it's pretty corrosive. Depending on what you have on your boat bottom, you will probably have to scrub. Having cleaned hundreds of boats, there are very few that are truly spray and rinse. If you have some truly difficult spots or stains, try a product called On & Off - it's even more toxic but also more effective.
1989 Bravura - repowered with 2001 PCM 351 GT-40 - 1.23:1 PCM Trans.
1989 comp - sold
1985 comp - sold