On Mon, 5 Nov 2007 13:21:20 -0500, "Nelson"
wrote:

Because my wife put the brakes on it, but thanks for the great responce very
helpful

The thing of it is, Eisboch is right.

Are you repainting an already painted hull? As in factory baked on
enamel?

Painting aluminum can be rather laborious process if you are starting
with bare metal. On older boats, you can never get the aluminum
absoutely clean enough for primer to properly stick. I did do it once
with a boat that had been painted - ended up soda blasting the hull to
get some primer on and even then, it was expensive.