Rust on marble CJ Crow 14 May 2013 12:33 EDT

Sorry for another marble rust question, but... I have been working on a couple stains on some Carrara White marble. They are a rust color and came from the bottom of a metal soap dispenser according to the home owner. They are irregular in size and about the diameter of a quarter to 50 cent piece.  I have tried a poultice and SRS 2000. So far no luck, the customer applied more SRS 2000 and left it on too long and created a new discoloration/stain. Any ideas on a plan C? /HELP!

CJ Crow
Stone Maintenance Inc.
In HIS grip
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