I'm going to call Grout Boost today and see what they say. Grrrrrr. I will never use that stuff again. The salesman at Lowe's was so convincing. He said I wouldn't regret the Grout Boost because it would save me from having to seal all the grout lines, and there are so many with old hex tile, and he said that it would provide a more even coloration for the grout than water mixing would, which I call on now too because I can see some lines are darker than others. It's not a "bad" room at all, I'm fully aware that A)I am a perfectionist and B) I hid the biggest problems under the tank of the toilet where no one will see them once the toilet is in, and C) only I will know where certain things bugged me about it. My husband and neighbor are both pretty happy with the job. I just want to get that scrub done, but their damned chemical really sucks on the hands, too. My skin feels horrible and nothing seems to help. What a horrible product. Plus the crap still stinks like epoxy.
Thanks, Jazman. I did try the rubber glove route initially, but that went by the wayside quickly because the grout was so hard to work. The Grout Boost people are saying 50/50 vinegar wash in 10 days for the bathroom, too... grrr. I just reviewed the product at Lowe's site >