With a steel boat, expect to spend a good part of your time on board painting. The general rule seems to be "if it doesn't move, paint it - if it moves, paint it 'till it doesn't".. and those nail guns are noisy beasts too!!
Aluminium is not much better - it just takes longer for everything to corrode. It's wood and 'glass for me.
"Honestly, I don't know why seamen persist in getting wrecked in some of the outlandish places they do, when they can do it in a nice place like Fiji." -- John Caldwell, "Desperate Voyage"