Problem: Fishblood Stains On Nonskid
While evidence of catches on your deck means you had a great day on the water, it's just plain yucky to look at.
The best method is to wash down any affected surfaces before the blood has a chance to dry. Should you miss a spot, sprinkle some Bar Keepers Friend on clean, wet nonskid, scrub, and rinse. Alternatively, try hydrogen peroxide or OxiClean (or generic equivalent) for really tough dried-on stains.
Thwart future stains with a coat of Woody Wax, which is safe to use on decks.
Problem: Hard water stains
Those icky white spots that appear on your hull, glass, or engine cowlings from mineral deposits mar your freshly cleaned finish.
Spray a mixture of equal parts vinegar and water, let sit for 5 minutes, then wipe off. Or keep a box of dryer sheets onboard. Moisten one with water, gently rub over the spots, then rinse for a sparkling shine.
Immediately after washing in a shady area, spritz the surface with a 4:1 water/vinegar mix. Use a wrung-out chamois to remove water droplets before they dry. Then apply a coat or two of wax, like Woody Wax, to help keep water spots at bay. For very hard water, consider adding a dockside or inline water filter to remove the minerals.