Can I use regular sanded grout on this exterior brick? These bricks are from decorative strips in my driveway, which have deteriorated over the years. I don't care how pretty the finished result is, I just want to fill the cracks and voids while semi-matching the color. I'd give it a good cleaning first, but I don't want bother with digging out any of the old mortar.
Also, would it be a good idea to cover it with plastic for a day, to keep it moist and not let it dry too fast? I assume I'd need to wet the area down good before grouting.