[sbw1]

Lots of Tiaras come from the factory with black, ablative bottom paint. Our boat is a 2004 and the color has held up well. The original paint was discontinued several years ago due to regulatory issues and we switched to a new ablative paint that was compatible with the prior coating. We called the factory and our yard used what Tiara recommend. It has held up well. The short answer is, call the factory in Holland, Michigan. They are responsive to this type of question.
BTW, we boat out of Spring Lake, Michigan so our water is not too different from the KZoo River. It is warm and a little on the dirty side.