Water Spot Removal: Marine Fiberglass

What You'll Need
Long Handled Brush
Short Handled Brush
Dish-washing Soap
Chemical Cleaning Product
Soft Cloth
Boat Wax

To keep your fiberglass boat in optimum condition, it's essential that you undertake water spot removal regularly. Although fiberglass offers a high level of strength and rigidity while maintaining a low weight level, it's basic properties allow stains and dirt to build up very quickly. In addition, the gel coating that is applied to protect the fiberglass is incredibly porous and susceptible to abrasions and damage caused by ultraviolet radiation. If you don't properly maintain your boat, it will look worn and used in no time at all, leading to maintenance problems and a low resale value. Remove water spots on the fiberglass hull by following these instructions.

Step 1 – Clean the Boat

It's very important to clean your boat regularly after use. If you remove the boat from the water, be sure to wash down the hull sides and deck with dish-washing soap as a precaution against stain build up. Due to the degenerative effect that exposure to salt water can have on the hull and other areas of your boat, you should always try to at least rinse your boat with fresh water immediately after removing it from the water. To help your boat last longer, you should thoroughly clean all other areas of the boat.

Step 2 – Scrub Stains

If there are any stains or water spots on your boat after you've washed it down, it is advisable to remove them as soon as possible. One easy and cheap cleaning material is simply mixing a gallon of water with a cup of vinegar. Use a hand held sprayer to apply it to the stained area and wipe it down with a soft cloth. You may need to repeat the process a few times for stubborn stains.

Step 3 – Use Chemical Cleaning Product

If the stain has not been removed after several applications of the vinegar and water mixture, you may want to try one of the many chemical cleaners that are available. Before doing so, make sure that your boat is removed from the water to prevent the chemicals from causing pollution in the event of accidental spillage. A variety of cleaners are available in boating supply stores, such as BABE's Spot Solver and Isso Firberglass Reconditioner, or alternatively, you can also use household cleaning products designed for showers. Follow the manufacturers instructions for best results. Most of the chemical cleaners work best if the hull is wet.

Step 4 – Wax Hull

Whether you managed to remove the water spots and other stains with the vinegar mixture or have used other chemicals, you need to re-wax the hull, as the treatments will have removed the protective wax coating. To prevent damage to the surface of the hull from stains and oxidation, it is essential to replace this wax coating before putting the boat back into the water. Waxing also helps to make stains easier to remove in future. Removing stains as they occur is the best way to ensure that your boat remains in the best possible condition.