Removing Scum From Your Aluminum Boat: A Step-By-Step Guide

Keeping your boat in top condition requires regular cleaning and maintenance. One of the biggest challenges faced by aluminium boat owners is removing lake scum from the boat's surface. This can be caused by algae, pollen, and other debris, and it can affect both the boat's appearance and performance. To remove scum from an aluminium boat, it is important to choose the right cleaning solution, prepare it according to the instructions, apply it to the boat's surface, let it sit, scrub it, rinse it, and dry it. Avoid using acidic cleaners, bleach, or abrasive cleaners as these can damage the boat's surface. Instead, opt for a mild cleaner such as a boat wash, detergent, or a specialised aluminium boat cleaner. Additionally, it is important to wipe away visible scum lines with a wet rag after each use and to rinse the boat with fresh water, especially if it has been exposed to salt or polluted water.

Choose the right cleaning solution

Choosing the right cleaning solution is crucial when removing scum from an aluminium boat. The wrong product can damage the boat's surface, so it's important to opt for a mild cleaner.

There are several commercial cleaning products available specifically designed for aluminium boats. For example, XPS Aluminum Cleaner is a popular choice that effectively removes waterline scum, algae stains, mould and oxidation without causing damage. It's important to follow the instructions on the label when using these products and to avoid abrasive cleansers or solvents.

If you don't want to use a commercial cleaner, a mild detergent mixed with warm water can also be effective. Simple Green, for instance, can help to remove scum, although it may require some elbow grease. Vinegar is another mild acid that can be used, either neat or diluted with water, and is particularly good for removing soft to mild hard water stains.

For more severe cases of scum and staining, a stronger acid may be needed. Muriatic acid (hydrochloric acid) can be effective, but it's important to wear protective clothing, including gloves and eye protection, as it can cause severe burns. Another option is to use a specialised product like "The Works" toilet bowl cleaner, which contains hydrochloric acid in a diluted form that is safer to handle.

In addition to choosing the right cleaning solution, it's important to prepare and apply it correctly. The cleaner should be applied to the boat's surface using a soft-bristled brush, sponge or cloth, working in small sections and applying extra pressure to heavily soiled areas. Allow the cleaner to sit for a few minutes to penetrate the scum before scrubbing and rinsing. Finally, dry the boat with a clean towel to prevent water spots from forming.

Prepare the cleaning solution

The first step to removing scum from your aluminum boat is choosing the right cleaning solution. Avoid using acidic cleaners, bleach, or abrasive cleaners, as they can damage the boat's surface. Instead, opt for a mild cleaner such as a boat wash or a detergent mixed with warm water. You can also use a specialised aluminium boat cleaner designed to remove scum and stains.

If you're using a boat wash or detergent, mix it with warm water in a bucket. Follow the instructions on the bottle if you're using an aluminium boat cleaner. For small areas or spot cleaning, you can mix two ounces of boat scum remover with water in a spray bottle. Lightly mist the area, but do not soak it.

It's important to note that some cleaning solutions may require dilution, while others should be used directly without dilution. Always read and follow the instructions on the product label to ensure safe and effective use.

Additionally, if you're dealing with a tough stain on vinyl, such as adhesive or rust, you can use a citrus cleaner followed by a rinse with dishwashing soap and warm water. For ink stains, apply denatured alcohol to the affected area and wipe it off.

Apply the cleaning solution

Now that you have chosen the right cleaning solution and prepared it according to the instructions on the label, it's time to apply it to the boat's surface. Here are some detailed instructions on how to do this effectively:

Start by applying the cleaning solution to the boat's surface using a soft-bristled brush, sponge, or cloth. Work in small sections, starting from the boat's top and gradually moving downwards. Apply the cleaner in a circular motion, paying extra attention to areas with heavy scum buildup. Ensure you apply enough pressure to these areas to remove the scum effectively.

If you're using a spray-on product, such as JJV's Best Boat Scum Remover, follow the manufacturer's instructions for application. For this product, you would use a Hudson sprayer to spray the intended area, working from the bottom upwards. Keep the area wet with the product and allow it to dwell for a few minutes. Thicker or more dried-on areas may require repeated spraying or a longer dwell time.

If you're dealing with a tough stain on vinyl, such as adhesive or rust, a two-step process is recommended. First, apply a citrus cleaner, then follow up with a rinse using dishwashing soap and warm water.

For ink stains on vinyl, a different approach is needed. Apply denatured alcohol to the stain and then wipe it off.

If you're cleaning the boat's upholstery and want to maintain its UV coating, use an XPS Marine UV Protectant spray. This will help prevent fading and cracking caused by sun exposure.

Remember to avoid using abrasive or stiff brushes, as well as abrasive pads, steel wool, or powdered abrasives. These can scratch and damage the boat's surface. Always test your chosen cleaning solution on a small, inconspicuous area of the boat first to ensure it doesn't cause any discolouration or damage.

Additionally, be cautious when working with acidic or harsh chemical cleaners. Wear protective gear, such as gloves, goggles, and long sleeves, to avoid skin and eye irritation.

Let the solution sit

Once you have applied the cleaning solution to the boat's surface, it is important to let the solution sit for a few minutes. This will allow the cleaner to penetrate the scum and loosen it from the boat's surface, making it easier to remove. The amount of time you should let the solution sit will depend on the type of cleaner you are using and the severity of the scum buildup.

If you are using a mild detergent or boat wash mixed with warm water, you can follow the instructions on the product label for how long to let it sit. Typically, you will apply the cleaner and let it sit for a few minutes before scrubbing and rinsing it off. For example, if you are using XPS Aluminum Cleaner, you would spray the cleaner onto the surface and let it sit for a few minutes before rinsing.

For more severe scum buildup, you may need to use a stronger cleaning solution or a commercial product specifically designed for removing scum from boats. In this case, it is important to follow the product instructions carefully, including how long to let the solution sit. Some products may require multiple applications or a longer dwell time for heavily soiled areas. For example, JJV's Best Boat Scum Remover recommends spraying the product onto the surface, letting it dwell for a few minutes, and then rinsing with clean water. Heavily soiled areas may require repeating this process.

It is important to note that some cleaning solutions can be harmful to the boat's surface if left on for too long. For example, acidic cleaners can damage the finish of an aluminum boat. Therefore, it is crucial to follow the instructions for the specific product you are using and not exceed the recommended dwell time.

Additionally, some cleaning solutions may require special safety precautions, such as wearing gloves or eye protection. Always read the product instructions and safety information before use.

Rinse the boat

Rinsing your boat is an important step in keeping it in good condition. Here are some detailed instructions on how to effectively rinse your aluminum boat:

Before you start rinsing, it is important to choose the right cleaning tools and products. You will need a hose or a pressure washer to rinse off the cleaning solution and scum. It is recommended to use fresh water, especially if your boat has been exposed to salt, polluted, or brackish water. You may also use XPS Aluminum Cleaner or a mild detergent mixed with warm water. Avoid using acidic cleaners, bleach, or abrasive cleaners as they can damage the boat's surface.

Now, let's begin the rinsing process:

• After scrubbing the boat's surface with a soft-bristled brush, it's time to rinse. Use your hose or pressure washer to thoroughly rinse the boat. Pay close attention to areas where scum buildup is more prominent. Make sure to remove all traces of the cleaning solution and scum.
• If you are using a pressure washer, adjust the setting to a moderate pressure to avoid damaging the boat's surface. Work your way from the top of the boat down, ensuring that all areas are thoroughly rinsed.
• Take extra care when rinsing around the hull waterline. This area is prone to scum buildup and staining, so it's important to remove the visible scum line with a wet rag after each use. Dried scum can be challenging to remove and may require more effort.
• While rinsing, keep an eye out for any areas that may have been missed during the scrubbing process. If necessary, go back and apply more cleaning solution to those areas, let it sit for a few minutes, and then scrub and rinse again.
• After you have thoroughly rinsed the boat, dry it completely using clean towels or chamois. This step is crucial to prevent water spots from forming on the boat's surface. Make sure to dry both the exterior and interior surfaces, including the upholstery and carpeting.
• If you are unable to dry the boat immediately after rinsing, ensure that there is proper air circulation to prevent mildew growth and odours. You can use fans to circulate air inside storage compartments and hatches.
• For areas that are difficult to reach, such as tight spaces or crevices, use a soft-bristled brush with an extended handle to scrub and rinse those areas effectively.
• If you are rinsing your boat after a long period of use, pay special attention to the livewell. Clean it regularly to maintain a healthy environment for fish and ensure clear water flow.
• If you are rinsing in preparation for long-term storage, make sure to remove all gear from the storage compartments and clean them thoroughly. Mildew can form if moisture is trapped inside these compartments.

Remember, rinsing your boat regularly and thoroughly is essential to maintaining its appearance and performance. By following these steps, you can effectively remove scum and prevent damage to your aluminum boat.

Frequently asked questions