Grout Haze Question

I am a customer of your MB products (MB-1 and MB-5) and am very happy with them for my porcelain tile floor and granite countertop.

 

I am redoing a bathroom using porcelain tile (Meridiana tile) with a border accent of tumbled marble.  The installer is grouting today with unsanded grout and Super-Tek acrylic grout additive.  He told me to use a 50/50 solution of water and vinegar tomorrow to remove the grout haze.  I am afraid to use the vinegar solution because of the tumbled marble.  I am afraid of etching.

 

Could you please advise me what I should do tomorrow to remove the grout haze.

 

Thanks,

Rosanna.

findstone2006-06-24 14:11:06