Ya know thats a fine idea! Perhaps we could all do it, and build a database of which colors are fastest for which boats. What color is your boot stripe?You might try a new color every year, construct a new polar diagram annually, and after ten years or so, you can just pick the color with the best polars.
Oh God yes, terribly slow!be sure to remove the old boottop paint before applying the new color so you don't get a build-up...that would be slow!