Wanna see a shiny aluminum boat?  Nope, not mine, it's a Tracker PT185 that is owned by a fellow from another site, and he gave me permission to post the pic (it'll be over at BPS site also in the "Cleaning Hull" topic someone posted).  The treatment he used after proper cleaning is called Sharkhide at www.sharkhide.com .  The Sharkhide he has on there has been on the hull for 4 yrs! 

 
Pic posted with permission of T. Rich