A little help. Any ideas for rust, mold and algae on natural stone?

[Jason Yahner 14]

I am bidding a decent size job that has a lot of natural stone with some large heavy rust spots, and the rest is covered in mold and algae. And ideas on a effective product or products? I'm considering OX acid on the rust. But I worry about SH breaking down the stone.

[Jason Yahner 14]

26 views and not one persons has any ideas on what to use.

[Celeste 341]

Call EacoChem

[Jason Yahner 14]

I'll try that. Thanks Roger or Celeste.

[staudend 14]

One-Restore from EacoChem, used to be called Saferestore. I've used it a bunch, AWESOME!!!

[Guy B 70]

OX or aluminum brightener for rust, sh for the rest. As long as it's natural stone I don't see a problem.

I would do a test spot on the rust first.

Edited July 25, 2011 by Guy B