That is really a great idea.

Perhaps, rather than going to the extra hassle and expense of getting custom colors and associated custom costs.... I wonder if it wouldn't be easier to simply sew on strips of the kind of reflective tape that one sees on night visible clothing.

The tape is readily available and probably not as costly.

For the sides of the hull (and maybe bottom) I'm sure there's also peel and stick versions of the same kind of reflective tape used on outdoor signs, posts, etc. Some of that stuff sticks like the dickens nad would probably be suitable for the waterline mark and may be suitable for a strip along the keel....

Just a passing thought on a cold, raining day.

Tom H.