How to Remove Rust Stains From a Fiberglass Boatby Russell Wood
Rust is difficult to remove on a metal surface, but when it stains a fiberglass surface -- like a boat's -- fixing the problem requires another solution. Fortunately, cleaners can fix the problem, and with a little bit of elbow grease, the rust can be scrubbed away.
Put on the rubber gloves. This will help protect your skin from any of the chemicals you're about to use.
Apply the calcium, lime and rust remover to the rusted area and allow it to work for about a minute.
Wipe off the calcium, lime and rust remover using the sponge. This should remove all of the rust, but if not, proceed to the next step.
Apply the calcium, lime and rust remover to the rusted area and allow it to work for about a minute. Scrub the rust using the scuffing pad side of the sponge.
Wipe the cleaner away from the surface using the sponge.
Place the water in the bucket. Then wash away the cleaner on the fiberglass using the water and the sponge.