I've always had good experiences with Wayfair in the past, so this one is a big disappointment.  When I received the vanity it was beautiful and in perfect condition.  But now the top has markings on it that look like the finish was eroded in some way, and I've only had it for about two months.  Engineered stone is supposed to be non-porous, so perhaps the problem is with a finish on top.  I'm going to contact the manufacturer, but this is certainly not something I would expect with a $1000+ vanity!