Boat paint suggestions?

[bigdog]

I need to paint the bottom of my Sunfish sailboat. I figure I only need a pint maybe a little more, but less than a quart of paint,
to complete the job. I've been told to use a marine bottom type paint product, as it will be in the water,
(only for sailing, otherwiise on land).

Have checked on WestMarine and Overton websites, but a quart of paint is around $40. Is it really that expensive?

Any suggestions? Can I use another type of paint other than marine bottom paint, since boat will only be in water during use, then stored on land. I was thinking enamal ?

Thanks,
BD