Just did a walk-thru on early 2000 Grand Alaskan and discovered the fuel tanks are painted carbon steel. The tops of the tanks were visible and like they may have been repainted. The sides and ends were encapsulated with insulation and perforated material and not visible. Each of the four tanks had an area at a lower corner with welded threaded nipples where the paint had some blistering and rust. Not heavy rust, could be brushed, ospho'ed, and painted. Troubling that the rest of the tanks sides are not visible or how they were installed. I like this boat but turned off with the tanks situation. Have heard some horror $$$$$ stories about replacing fuel tanks. Thought steel tanks went away long before 2000. I realize there have also been problems with aluminum tanks too. Any comments on carbon steel diesel tanks?