Ayrton Oneill
Keeping your boat clean is important, especially if it's been sitting in the water all season. Lake scum can be a tough barrier to clean, but there are many ways to get your boat looking brand new. From using a pressure washer to applying a vinegar solution, there are many methods to try. Some people recommend using toilet cleaner, while others suggest stronger chemicals like oxalic acid or FSR (Fiberglass Stain Remover).
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What You'll Learn
Use a toilet cleaner
Toilet bowl cleaner is a great option to clean lake scum off your fiberglass boat. It is safe to use on fiberglass and painted wood. However, it is important to note that toilet bowl cleaners contain strong acid chemicals, so you need to be careful when using them. Make sure to wear protective gear, such as rubber gloves and goggles, as the acid can damage the glue holding in the bristles of your boat deck brush. You can spray or brush the toilet bowl cleaner onto the boat hull. Some people prefer to let the boat dry a little before applying, but you can also do it when the boat is still wet if time is a concern.
Toilet bowl cleaner works wonders to remove scum, algae, barnacle growth, and other stubborn rust stains from your boat's hull. It is a great option if you are looking for a cheap and effective solution, as it is easily available in dollar stores. One user recommends the brand "The Works", which costs $1 per bottle and is enough to clean the bottom of a 25-foot boat.
When using toilet bowl cleaner, it is important to follow the instructions on the bottle. Squirt the cleaner under the rim of the toilet and let it run down, or apply it to your boat hull with a brush or spray. Lightly scrub it around, let it sit for a few minutes, and then rinse it off. Be sure to rinse liberally with fresh water to dilute the solution and make the run-off less concerning for the environment.
While toilet bowl cleaner can be effective, it is not specifically designed for cleaning boat hulls, so improper use may harm the hull or cause discoloration. If you are looking for a product specifically designed for boat hulls, you might want to consider an acid-based cleaner like Star-Brite Eazy Off Bottom Boat Cleaner, which is designed for cleaning scum and stains from boat hulls and has received positive reviews from customers.
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Try a vinegar and water solution
A vinegar and water solution is an effective natural solution for removing lake scum from a fiberglass boat. This method is particularly useful for those who prefer eco-friendly cleaning options.
To start, you will need to prepare a solution with equal parts vinegar and water. You can then fill this solution into a spray bottle to make it easier to apply. Spray the solution onto the scum-covered areas of your boat and let it sit for a few minutes. Next, use a brush or sponge to scrub the area. Apply moderate pressure when scrubbing to effectively remove the scum without damaging the fiberglass. After scrubbing each section, make sure to rinse the boat thoroughly with clean water.
While this method is effective for removing lake scum, it may require a significant amount of time and effort. In addition, it is not clear how well this method works for removing caked-on scum. For example, one source mentions that using a vinegar solution involves "15-20 hours of arm strong application" and scraping with their thumbnails or a plastic bread tag. Therefore, if you are dealing with heavy scum buildup, you may need to repeat the process or try a stronger cleaning solution.
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Apply a gel cleaner
When using a gel cleaner, it is important to follow the instructions on the bottle. Some gel cleaners can be applied directly to the boat's surface, while others need to be mixed with water first. Make sure to wear protective gear, including gloves and eye protection, as these cleaners can be toxic and cause skin and eye irritation.
For gel cleaners that require dilution, use a pump sprayer to apply the mixture to the boat's surface. Let the cleaner sit for a few minutes to activate and break down the scum. Then, use a brush to scrub the area gently and loosen any remaining scum. Finally, rinse the boat thoroughly with fresh water, ensuring that all traces of the cleaner and scum are removed.
Some gel cleaners, such as FSR (Fiberglass Stain Remover), can be applied directly to the surface without dilution. Wipe the gel onto the boat's surface using a wet cloth or towel. Let it sit for a few minutes, and then wipe it off. Rinse the boat with fresh water and repeat the process if necessary. Be cautious when using FSR, as it contains acid and can irritate the skin.
Another option is to use a toilet bowl cleaner, which can effectively remove lake scum. Squirt the gel cleaner under the rim of the toilet or onto the boat's surface, allowing it to run down the sides. You can also use a brush to scrub it gently around the affected area. Let it sit for a few minutes, and then rinse it off with water.
It is important to note that some gel cleaners may not be suitable for all boat surfaces. Always test the cleaner on a small area first and follow the manufacturer's instructions and safety guidelines. Additionally, some users have recommended using a vinegar and water solution to keep lake scum from building up on your boat.
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Use oxalic acid
Oxalic acid is a powerful cleaning agent that can be used to remove lake scum from a fiberglass boat. It is the main ingredient in many deck cleaners, wood brighteners, and hull cleaners. The acid penetrates the gel coat pores, removing all stains with minimal scrubbing and almost no work.
To use oxalic acid to clean your boat, follow these steps:
- Put on gloves and other protective gear, such as eye protection and long sleeves, to avoid skin and eye contact with the acid. Oxalic acid is a serious chemical, so it is important to use it sparingly and follow the instructions on the product label.
- Dilute the oxalic acid with water as directed on the product label. The exact ratio will depend on the concentration of the acid and the severity of the scum build-up.
- Apply the diluted oxalic acid to the stained areas of your boat using a spray bottle, brush, or wand-type pressure sprayer. Make sure to coat the entire stained area generously.
- Allow the oxalic acid to sit on the surface for a few minutes. You should see the acid reacting with the hard water scale and scum, bubbling on the surface.
- After the reaction has ceased, start scrubbing the area with a pad or brush. If needed, you can also use a plastic scraper to remove any stubborn scum or scale.
- Rinse the area liberally with fresh water. The added water will help dilute the oxalic acid and make it safer to dispose of. Use a bucket of water to rinse your pad or brush as well.
- Repeat the process if necessary for any remaining stains or scum.
Using oxalic acid is an effective way to remove lake scum from a fiberglass boat. However, always exercise caution when handling this strong acid, and be sure to follow the safety instructions on the product label.
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Try a commercial hull cleaner
If you're looking for a more heavy-duty option to clean lake scum off your fiberglass boat, you can try a commercial hull cleaner. These products are designed specifically for removing stains and scum from boat hulls, and they often contain oxalic acid as the main ingredient.
One popular option is "Star Brite" hull cleaner, which has been recommended by several people and is known to deliver good results. Another product that has been mentioned is "Power One" by Fountain of Youth Products, which is touted as the "best hull cleaner out there". These commercial hull cleaners are a great option if you're looking for a more powerful and faster-acting solution than natural or milder alternatives.
When using these commercial hull cleaners, it's important to follow the instructions on the product carefully. Most of these products are meant to be applied with a spray bottle, which allows for controlled application and helps avoid skin contact with the acid. Make sure to wear gloves and protect your skin and eyes from the chemicals. You should also rinse the hull liberally with fresh water after application to ensure that any remaining residue is diluted and washed away.
In addition to commercial hull cleaners, you can also explore toilet bowl cleaners, which work similarly and contain similar ingredients. Some specific products mentioned include "Clorox Toilet Bowl Cleaner", "Scrubbing Bubbles", and "Toilet Duck". These toilet cleaners are applied in a similar manner: squirt or spray the product onto the scum, lightly scrub it, let it sit for a few minutes, and then rinse it off.
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Frequently asked questions
There are several ways to clean lake scum off a fiberglass boat. You can use a toilet bowl cleaner, or a mixture of vinegar and water, or a commercial hull cleaner.
Some popular hull cleaners are On & Off, Starbrite, and Slimy Grimy.
Squirt the toilet bowl cleaner on the affected area, brush it around, let it sit for a few minutes, and then rinse it off.
After a day on the water, spray the mixture on the boat and this will keep the scum off.
Yes, hull cleaners can be toxic and dangerous. Always wear protective gear, such as gloves and eye protection, when using any cleaner.
