CLR in a small dose to start. My husband does fiberglassing on yachts for a living and I asked him and he said ... re-fiberglass is your only option. Try the Mr Clean eraser.
Because its yellow
It's to remove yellow surface discoloration or stains (e.g.,tobacco stains)
You can try mixing baking soda with water to form a paste, then apply it to the yellow stains on your Converse shoes. Let it sit for a few hours before scrubbing with a soft brush and rinsing with water. Repeat the process if necessary to fully remove the stains.
To clean yellow smoke stains from a fiberglass bathtub, you can try using a mixture of baking soda and hydrogen peroxide to create a paste. Apply the paste to the stained areas, let it sit for about 15-20 minutes, then scrub with a sponge or soft brush. Rinse thoroughly with water. If the stains persist, you can also try using a commercial fiberglass cleaner.
i stored a vinyl hot tub in storage and now it has yellow and black mold stains on it. how do i remove the stains and smell?
just dont be messy and you wont have to know.
It would help immensely if you said WHICH glue made the stains. As this was during plumbing, it may have been yellow ABS Glue, in which case your best remover is Whitlam's Glue Wash. -Rub the stains with a rag dipped in this and they should soften and come off -IF it's ABS glue.Next time please -Name your Glue -
Could be iron bacteria. Could also be the adhesive. We have yellow stains on our roll flooring from the installer using the wrong adhesive. Tom
Seaman stains
There is now a product available that will eliminate all underarm stains in clothing!! PitStop underarm stain remover does what all detergents and stain removers claim to but can't deliver. All you have to do is pre-treat the stain and let PitStop do the rest.
There are two solutions that work. First white vinegar will take these stains off and also use a weak alcohol solution this will help as well.
The yellow stains in Tupperware are typically caused by storing tomato-based sauces or acidic foods in the container. Over time, the pigments in these foods can seep into the plastic, causing staining. These stains can be difficult to remove but soaking the container in a mixture of baking soda and water, or using a paste of baking soda and water, can help eliminate them.