What can I use to get the hull white again? I think it's stains cuz the discoloration has strange patterns in it, not just as it she sat in water too long??
Wrong forum for this question. Go to marine supply store, they have tons of cleaning products that will work great. Also, toilet bowl cleaner works good on fiberglass hull and it also smells better than marine grade stuff. Make sure you use gloves, some of that stuff is highly corrosive ad will irritate or burn your skin if exposed.