Q&A for How to Clean Fiberglass

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  • Question
    How do I clean water spots on fiberglass?
    Michelle Driscoll, MPH
    Founder, Mulberry Maids
    Michelle Driscoll is the Owner of Mulberry Maids, which is based in Fort Collins, Colorado. With five years of experience, her business specializes in cleaning homes and small offices. She holds a Masters in Public Health from the Colorado School of Public Health. Additionally, Mulberry Maids has an A+ rating from the Better Business Bureau.
    Founder, Mulberry Maids
    Expert Answer
    You can try to use phosphoric acid (rust remover), diluted by 10% with water. Make sure to wear gloves, and rinse the acid away as soon as possible to prevent damage to the fiberglass.
  • Question
    Can all of these methods be used on gel-coated siding on RVs?
    Michelle Driscoll, MPH
    Founder, Mulberry Maids
    Michelle Driscoll is the Owner of Mulberry Maids, which is based in Fort Collins, Colorado. With five years of experience, her business specializes in cleaning homes and small offices. She holds a Masters in Public Health from the Colorado School of Public Health. Additionally, Mulberry Maids has an A+ rating from the Better Business Bureau.
    Founder, Mulberry Maids
    Expert Answer
    Yes, but make sure to be careful to not use any scouring or hard wire brushes when cleaning, as it can damage the gel coating.
  • Question
    How do I clean outdoor fiberglass stairs?
    Community Answer
    You can use these same steps, but be sure to stay off the stairs as much as possible until they have been fully cleaned and dried.
  • Question
    I have two sets of Fiberglass outdoor steps at my double wide mobile home. I have rubber treads on each step, as they are a rough surface. Dirt has gotten under the treads and it will not wash off with my water hose. What can I use to clean under the treads?
    Community Answer
    Try using white vinegar and let it soak for 30 minutes or so, then try using hot water to rinse.
  • Question
    How do I remove moss from the outside of a fiberglass oil tank?
    Community Answer
    Use hot water. Don't scrub, as it will most likely damage the glass or plastic you are using.
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