Steel boats can rust from the inside out. Because you can't behind all of that cabinetry and ceilings. So if you have any rust starting in the inside of the vessel. It will be hard to attend to even if you know about it.
It is phosphoric acid mixed with water in a spray bottle will stand you in good stead.
Have worked on steel vessels all of my maritime career and chasing rust, painting and other hull maintenance is normal. but with the newer paints they have out now you work about as hard as you do keeping your teak trimming bright.
I have seen wood vessels whose steel fastenings bleeding rust through the paint. and the same with fiberglass boats also. Because of some of the stainless steels do bleed rust.
Last edited by Boasun; 04-27-2008 at 02:45 PM.