QUESTION:

I have cast stone around my porch and it has a lot of black stains. How can I clean this off without damaging my stone?

PICTURE:

SOLUTION:

Do not use Muriatic Acid. There are two products that you may try. One is Light Duty Restoration Cleaner by PROSOCO. The other is BioKlean by PROSOCO. The use of approximately 1000 lbs. pressure will help both of these products do the job.

SUPPLIERS:

www.prosoco.com Link to the service provider page