[Rich]

If you don't care how it looks, and you will be removing it anyway, you may want to try to remove it yourself with "On-Off" bottom cleaner.

This is the stuff we normally use to remove the lake slime from the bottom of a non-bottom-painted boat.

I noticed on an older boat that it also does a good job of removing some bottom paints.

It's messy, and not fun to work with as it is a type of acid, so you have to be careful. But you can get it in gallon quantities, and it just may remove your bottom paint. Or it may just make a mess of it and you may still have to remove it in some other method.

Good luck!