On Jul 17, 4:56 am, wrote:
Hi there, I had picked out some flagstone to face a wall, it has good
colaration and also quartz glitter.

After the workers grouted it, they havn't done the best to clean the
grout off, leaving a hazy look. They don't care about the look as
much as I do, not bad but not to the degree of cleaniness I would have
done myself... but I wasn't there to supervise unfortunately.

It has been less than 24 hours so I might do some action... Do you
think I could use something to clean it up better? how about a good
scrub with some water and scrotch brite pad? Or just a sponge?

Some cementitious materials take a week or more to approach full
hardness. I'd relax. Time and sun/weather will have effect, too.

I'd keep it covered and moist right now, to fully cure.

Maybe later, a quick scrub with dilute HCl. Maybe not.

HTH,
J