I recently purchased a 30 year old condo. the flagstone foyer looks terrible. It has so many
stains and discolorations I couldn't begin to clean it. My friend has the same unit and it appears her foyer was painted all one color, leaving the grout natural and only painting the stones themselves, it looks great. Can I do this, and what kind of products would I need? I can't use an oil based product as it's the only way into the apartment so it must be relatively fast drying.
Thanks in advance for any help you can give me.