Go to Oreilly auto parts and get a bottle of Zing hull cleaner.Spray it on and let sit 5 min. wash off.DO NOT get the stuff on your skin it will burn like crazy. I use it on my fiberglass hull and it will make one look new.Just have to wax good after it dries. It will work on painted Aluminum also but i would still put a coat of wax on afterwards. A boat detailer told me about the stuff and it is worth every penny.I mix mine 50/50 with water but the bottle states for heavy grime to use full strength
There will be days when the fishing is better than one's most optimistic forecast, others when it is far worse. Either is a gain over just staying home.