Although flooding is a common cause there are several other reasons this color change will occur.
Repair cultured marble yellowing.
Mold is a common problem in many bathroom settings.
If the gel coating has worn down a bit the coating and cultured marble may become stained.
Instead use a soft cloth and liquid based stain removers such as vinegar or a mild soap and water to treat many kinds of stains.
These stains can be the result of a water glass that was left on a marble countertop for too long or from hard water buildup around sinks and showers.
Cultured marble is a beautiful material but one that requires special care to keep it in good condition.
As marble wears the highly polished surface begins to become scratched and worn.
The problem of yellowed white marble is not uncommon.
Cultured marble a mix of marble powder and a polyester resin requires a gentle touch when it comes to cleaning.
You can try this on a small scale first to see if it works.
All over the united states i have encountered marble that has turned yellow and even brown.
Below are two stain removal methods.
Avoid using abrasives which may damage the surface.
Pour some hydrogen peroxide on a spot and cover with plastic wrap.
Cultured marble may yellow over time for various reasons.
Vinegar chlorox peroxide comet.
Mold can stain marble bathroom countertops floors etc.
Let sit for 24 hours then lift the plastic and wipe up the peroxide.
Then i went over it with 1000 grit wet dry.
One for removing mineral deposits and the other for removing general stains.
But for most of these surfaces there is a way to clean them and still maintain the natural looking beauty of their clear and unblemished surfaces.
Water stains are yet another common stain that occurs on marble.
Cultured marble vanity tops often thought to be among the most classy and beautiful of surfaces you can build into your vanity are also some of the more difficult to clean without creating permanent scratches abrasions and other types of marks.
I ended up taking 200 grit wet or dry sand paper and wet buffing the whole top down.
Restoring yellowed cultured marble is often seen as a rather difficult task when it really doesn t need to be.