See full version: How to remove yellow stains from fiberglass boat
Customer asked:
I have a 10 year old white fibreglass boat and it now has a faint yellow tinge to the white hull. This is not left in the water. Is this something that one of your products could return back to the original white?
Answer to the Question:
This is a common occurrence resulting from the use of Boat Wax that contains Carnauba Wax. Many boat manufacturers now recommend that you do not use Carnauba Wax based products and only use synthetic products like Premium Boat Shine to protect your boat.
The best and easiest way to remove the yellowing and restore the original color and shine is with a 50/50 solution of Boat Clean Plus and Boat Scrub. This is what’s recommended by the boat manufacturers. Wash the boat first with a 1:10 solution of Boat Clean Plus and water and then use a soft cloth and the 50/50 solution to rub away the stain. You can use a Marine Scrub Mitt to reduce the labor required and the amount of time necessary to restore your boat.
Because of the age of your boat, the stain my have built up over the years and become indelible. If the above remedy does not work then the next solution is to wet sand the surface, followed by rubbing compound to remove the surface scratches and restore the shine, followed by Boat Scrub to remove the rubbing compound. This is pretty extreme because you will be cutting several layers of gelcoat off your boat, exposing the pores and making it more susceptible to environmental deterioration in the future.
Once a boat has been compounded or wet sanded you will probably have to detail the boat 2 to 4 times per year, depending on where you’re located and the ambient weather conditions, to maintain the finish. Compounding should be a remedy of last resort and should only be used if all else fails.
When the color and shine is restored protect your boat with Premium Boat Shine. It is synthetic so it will not yellow or stain and it will give you a diamond hard anti-static finish that will not get greasy or oily in the sun. Waxes tend to be greasy when warmed by the sun and this attracts and holds dust, dirt and pollutants against the surface. You will notice that Premium Boat Shine resists black streaks much better than wax। It is a combination sealer and polish and it contains some of the VS721 polymer for added durability. On boats in good condition, two coats on the hull will last a whole year even in South Florida.
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This article was co-authored by Michelle Driscoll, MPH. Michelle Driscoll is the Owner of Mulberry Maids based in northern Colorado. Driscoll received her Masters in Public Health from the Colorado School of Public Health in 2016.
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You might be a little lost when it comes to properly cleaning your fiberglass shower or tub, but you certainly aren’t alone. Wear and tear create stains and scratches on your bathroom surfaces, and usually they’re pretty easy to tackle. Fiberglass surfaces, however, are more of a challenge to sanitize because of their sensitivity. Clean, remove stains, and preserve your fiberglass bathtub or shower to keep it looking new. [links]
A boat spends most of its time at rest in the water so it is inevitable that algae, barnacles and other marine creatures will settle on it. This extra growth is not necessarily harmful but it does lower the performance of the boat.
Boat cleaning for wooden bottomed boats tends to be more challenging and more physical, hands-on work. The type hull will dictate whether a pressure washer can be used. Obviously it is not a good idea to use lots of pressure if the hull is heavily caulked. Generally a wooden bottom should be scraped clean. here
Cleaning the bottom is easier if you can take the boat out of the water or land it on a sand bar as the tide goes out.
Is this something that one of your products could return back to the original white?
This is a common occurrence resulting from the use of Boat Wax that contains Carnauba Wax . Many boat manufacturers now recommend that you do not use Carnauba Wax based products and only use synthetic products like Premium Boat Shine to protect your boat. here
IN SUMMARY, to remove yellow stains from fiberglass, you have to: