My mom's kitchen has white ceramic tiles and beige sanded grout. The
beige becomes brown quickly due to food spills and whatever. Last time
we cleaned it, I applied a sealant. A few months later, it's brown
again. What is the best way to keep it less stainable? can I put epoxy
grout on top of the sanded grout? or a grout "paint" that seems to be
used for bathroom wall tiles? thanks