I'm going to be painting the inside of my aluminum boat. I've filled it (to about the water line) with water and verified no obvious leaks, so now I'm ready to paint. A buddy of mine said just go to home depot and get an exterior latex. Will this be sufficient? I'm on a bit of a budget cause I have the wife and three kids. Also, what would be a good color choice? I'm afraid white will reflect the sun to much and black would get way to hot on the feet, so I'm thinking blue or grey? Any ideas?