I do no if you have a portable or tuck mount with up 900 -100 psi. I would use a single jet Gekko.  Scrub the grout lines to loosen what you can, then power rinse.
It probably will not remove it all, but will help with the majority.


On Mon, May 19, 2014 at 7:18 AM, Baird Standish <bairdstandish@gmail.com> wrote:
Is that grout or just junk that has fallen in between stones that are placed end to end?


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> On May 19, 2014, at 10:06 AM, Dayron <dayron@perfectmarblefloors.com> wrote:
>
> 5500 sq Ft of this crap knifing it out any suggestions
>
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> Dayron Padilla
> Perfect Marble
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