There are various boat cleaners manufactured and sold commercially that can be used to get rid of tough stains or to give a glossy showroom shine to fiberglass surfaces. However, you can make your own effective boat cleaner as an alternative to the store-bought versions by using household items and ingredients. These cost-efficient cleaning solutions will not damage the protective gel coating on fiberglass boats and will leave boats sparkling.
Fiberglass Cleaner
Pour one pint of water into a clean bucket.
Use a measuring cup to add one cup of 70 percent isopropyl alcohol to the water.
Add one tablespoon of ammonia.
Mix the items thoroughly with a mixing stick.
Use a funnel to pour the mixture into a plastic spray bottle.
Spray the mixture onto the fiberglass boat and clean the boat with water and a clean rag.
Showroom Shine
Mix two tablespoons of cornstarch with one gallon of warm water in a bucket.
Add one half cup of ammonia and one half cup of white vinegar to the cornstarch and water.
Mix the ingredients thoroughly until they have dissolved into the water.
Use a funnel to pour the mixture into a plastic spray bottle (without spilling). Apply this mixture to the fiberglass boat surface and wipe off with a clean, damp rag for a showroom shine.
All-Purpose Cleaner
Add one half cup of baking soda to one gallon of warm water in a bucket.
Add one half cup of white vinegar to the mixture, as well as one cup of ammonia.
Use a mixing stick to mix the ingredients thoroughly.
Pour the mixture into a plastic spray bottle. Spray the boat cleaner on various boat surfaces, as well as fiberglass surfaces. Rinse with a clean, damp rag.