Stain removal on Marble

[SuperDave212]

Working on a new 6o meter yacht and they are getting this green staining in various places, tried Alpha RSR-2000 which reacted and turned purple but didn't lighten staining....left 40 clear and a poultice overnight, nada....any suggestions before they tear it out and replace...thanks

 

[FredC]

jpegs

 

[Mikey P]

Rust from below..

 

[SuperDave212]

there's a marble green bloom glue stainer remover I'm going to try, says could be caused by adhesive....alpha stain remover did react like it was rust but didn't lighten it at all...

 

[Kenny Hayes]

Could it be plant water at some time. Keep posting, cause I have quite a bit of marble in my churches, and am curious.

 

[steve_64]

Found this.

 

[clean image]

I removed a bunch of green from limestone with F9. It was from copper. I also have metal can of green stain remover, you have to use a respirator to use it it smells so bad.

My guess if it coming from underneath it is terminal. Even if you get ti out, likely to come back

 

[srosen]

These type of stains are a real problem to remove. If RSR is reacting it is most likely an oxidation. What's under the floor which is probably impossible to find out. Could have to do with copper piping under the floor. We have been successful using phosphoric dilutions to digest the oxidation-not sure it will work here.