Rust on Fiberglass

Fiberglass Rust Stains

Fiberglass doesn’t oxidize or corrode, but that doesn’t mean you don’t have rust spots and stains to deal with.

From recreational equipment, to sinks, bathtubs, boats and campers, fiberglass is so widely used that knowing how to clean and maintain these surfaces is a necessary skill in maintenance expertise.

Fiberglass products are made from a plastic resin forced together with glass fibers. The surface layer, a polyester coating called gel coat, is smooth and shiny. Because of this hard, shiny surface, fiberglass is soil and stain resistant. When rust finds its way to your fiberglass surface, it is most likely a stain that has developed over time, from a nearby rusty metal. If an iron-containing metal, such as steel, rests on, is fastened to, or drips water on another surface, it can create a reddish-brown rust stain that worsens over time. Some situations of rust on fiberglass might include:

  • A leaky faucet dripping high-iron-content water onto your sink.
  • Metal nails, screws or other fasteners
  • A metal razor or shaving cream can (often with a small steel ring on the bottom) that sits in the same spot on your sink or tub over time.
  • A rusty garden tool is left lying on an outdoor table.
  • A metal houseplant container on your countertop.

Removing Rust from Fiberglass

Fiberglass is easily damaged by abrasive cleaners, so it is important to use a product specifically designed to clean stains without scratching. Fortunately there is a product that will remove rust from fiberglass on contact, without damaging the surface.

For fiberglass stains on bathroom surfaces, RustAid Bathroom Spray Gel is specially formulated to dissolve rust stains on contact. This product cleans fiberglass, tile, stainless steel, chrome, porcelain, glass, concrete, and more. Safe for indoor surfaces when used as directed.

For larger areas and to clean stubborn outdoor rust stains use, RustAid Rust Pourable Stain Remover. It dissolves rust with no rubbing or scrubbing required. RustAid Stain Removal products are biodegradable and create no harsh fumes.