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How to Remove Rust Spots on a Gel Coat

2012-07-01   Views:9

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Metal components secured to the fibreglass hull of a boat cause rust stains when exposed to water environments. The amount of rust staining increases when the boat is used primarily in salt water. Unlike waterborne stains, rust requires more than soa

How to Remove Rust Spots on a Gel Coat

Metal components secured to the fibreglass hull of a boat cause rust stains when exposed to water environments. The amount of rust staining increases when the boat is used primarily in salt water. Unlike waterborne stains, rust requires more than soap and water to remove it from the gel coat surface of a fibreglass boat. Specific cleaners are marketed to remove rust stains from gel coated hulls. Although they are effective, a more affordable liquid -- a common ingredient in rust removers -- will remove rust stains from gel coat without damaging components attached to the hall.

Skill level:Moderately Easy

Things you need

Pressure washerScrub brushSoapy waterOxalic acid

Instructions

1 Remove algae and loose debris from the hull of the boat by spraying it with a pressure washer. Remove remaining debris from the hull by scrubbing it with a scrub brush and soapy water.

2 Apply oxalic acid to the still wet hull with the wet scrub brush. Scrub the rust stain thoroughly for two to five minutes. Allow the acid to sit on the stain for 10 to 15 minutes.

3 Pressure wash the oxalic acid from the boat hull. Allow the hull to dry for 30 to 45 minutes. Inspect the rust stain.

4 Wet the hull again if the rust stain remains. Apply oxalic acid to the remaining rust stain. Allow the acid to sit on the stain for 45 minutes to one hour. Pressure wash the area to remove the acid from the hull.

Tips and warnings

Wear rubber gloves to protect your hands from the irritating affects of oxalic acid.

Protect your eyes with safety goggles when applying acid to a gel-coated hull.

Keep soda ash near your work area in case the oxalic acid spills on the ground.

Only use oxalic acid in a well ventilated area.

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