How do you make a yellowed fiberglass shower look white again? Mine is 22 yrs. old. At one time I used Gel Gloss for boats. Nothing seems to work now.
By rmm9356 from Buffalo, NY
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I don't have an answer for you but I certainly know your pain. I have two showers that need the very same thing. I will be looking back on your feedback to get some good advice for my bathrooms too.
It could be soap scum that needs to be cleaned. If it is not that you can look in the yellow pages under fiberglass and find people who can refinish fiberglass. tubs and showers. Or have a new fiberglass liner installed by Bath Fitter. Also found in the yellow pages under baths
Im sure its not just soap scum they are asking about. The top rim of a garden tub has yellowed over time with no one using it. Nothing seems to bring it back. Marine, RV or auto products.
I believe the question is how to remove the yellowing from aging fiberglass or plastic? I stumbled onto a video about this on Youtube but it's a video only chemist's should watch. In that video he refers to using Sulfuric Acid and creating a chlorine mist, or something very lab-worthy... so unless you are a chemist maybe replacing the tub or shower is best or atleast safest option (though painting might work too?)?
Have you tried Bar Keeper's friend? That's what I use to clean my tubs. I have hard water. You will find if you sprinkle it on, add some water and brush it on, leave for a while, 15-20 mins come back and with little scrubbing you'll see results. Although, not sure where and how much yellow you have in/on your tub. Also BKF works great on glass(like the shower doors), polishes brass, stainless steel,porcelin and more!
Do NOT use scouring powder on fiberglass or plastic as you will ruin it with scratches! That will only make things worse. This solution is only for porcelain.
Fill tub with hottest water, add dishwasher detergent - half a box (or a lot of it), OR add oxyclean, stir, let sit for a long time, maybe an hour or till the water cools. Do this over and over if needed. It will whiten more also, after draining. It works! I use this also for my whirlpool tub and run it for 30 or more minutes.
I remember this happening to a house we had when i was a child. My mom used a melamine paint. BUT first you must sand the surface with a tough grit sandpaper then wipe off all dust and clean the tub with straight bleach no dilution. then let dry at least 12 hours.
My white fiberglass garden tub has turned yellow on the outside as well as the inside. The only places that did not yellow was where something was setting on it, i.e. home decor, and where the bathmat was. Those places are still white. Any suggestions please?
A scouring stick works. But it takes a lot of them. I was wondering if a restaurant style grill brick would work.
Grill brick will ruin the fiberglass with deep scratches!! Don't do it. Fiberglass needs polished to a shine not abraded into oblivion.
I'm buying the easy off fume free oven cleaner, and trying that first. If that doesn't work, I'm putting a large bottle of Saloncare 40 at the beauty supply.
Must watch to believe it..
No scrubbing
Instant- bright white. Like brand new
Spray on rinse off
Done...
You all/ and new who are trying to find something
are Welcome...
I used hydrogen peroxide and bright light from a led light. I wet the upper edges of the tub and lined with toilet paper. The slowly wet the paper with hydrogen peroxide. I basically mummified my tub in toilet paper. Then every day I applied my hydrogen peroxide to the dried paper. It took about a week. I also left on a bright LED light in the room. I was shocked that the tub actually turned white again. I peeled back a little area everyday to see how much it had whitened.
How to whiten yellowed fiberglass bathtub
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