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The answer: YES. Muriatic acid is the best solution for cleaning scum off of fiberglass hulls. Forget expensive hull cleaner or any other "marine" product that claims to remove. Muriatic acid removes all scum/discoloration without any effect to the gel coat for about $6/gallon. Get a garden/lawn sprayer, an open area (for venalation), long pants/shirt that you don't care about, rubber gloves & goggles. The Muriatic acid will do the work, only light scrubbing may be necessary as the chemical dissolves the scum itself. Once the acid has sat for 5-10 mins, spray with water and then wash with a mild soap. In the end, you will have a brand new looking hull. Remember to wax after to protect in the future.
One word of caution is that the Muriatic acid fumes are very powerful. Be sure to be in a well venalated area and wear a painters venalator mask if necessary.
Enjoy your brand new looking hull!
What else can I help you with?
Can you use muriatic acid to clean paint stain on a fiberglass boat?
Using muriatic acid on a fiberglass boat is not recommended as it can damage the surface. It's best to use a cleaner specifically designed for fiberglass to remove paint stains. Test a small, inconspicuous area first before proceeding with the entire stain.
How do you clean battery acid off my fiberglass boat?
by a wet cloth soaked in salty water
Does muriatic acid damage vinyl boat seats?
Yes, muriatic acid can damage vinyl boat seats. It is a highly corrosive substance that can cause discoloration, deterioration, and weakening of the vinyl material. If you need to clean boat seats, it's best to use a cleaner specifically formulated for vinyl to avoid potential damage. Always test any cleaning product on a small, inconspicuous area first.
How do you clean a fiberglass boat?
take some vinegar and mix it in a bucket of water and use a rag to clean the outside... or you could put it in a spray bottle
Can muratic acid harm aluminum?
i want to clean algi from pontoons on my pontoon boat,,can muratic acid be used??????
Is fiberglass panel on a boat hull fireproof?
Fiberglass is actually very flammable.
How is a fiberglass boat better than a wooden one?
I would think a fiberglass boat is better than a wooden boat because a wooden one can rot and would be hevy to move weres the fiberglass boat wont rot and is light so would be easy to move.
How do you clean up an acid spill on a boat?
Depends what kind of acid, and what it spilled onto. - you haven't told us either one.
How do you remove fecal stains from fiberglass boat?
You can clean fecal stains from a fiberglass both by using hot water and dish washing liquid. Let the stained area soak in the soapy water for awhile before wiping it down.
What cleaning supplies should be used on a fiberglass boat?
A sponge and some fiberglass sealers works the best on a fiberglass boat. There are other fiberglass cleaning material available depending on what your particular need is. For just basic cleaning, I would go with the sponge and fiberglass sealer.
How to remove dried barnacles from fiberglass boat?
You can remove dried barnacles from a fiberglass boat using a stainless steel scrubber or a pressure washer for large barnacles.
How does a fiberglass boat float?
A boat floats by keeping water outside, regardless of any material
