Had a plastic one in our last rv and chose the upgrade to stainless for our 15B. Very glad we did. Have had not trouble with the stainless so far but we do wipe it down after use. I was much less concerned with the staining in the acrylic sink than scratching with pots, pans, and silverware that occurred in our previous rv.
Tim and Julie
2013 Escape 15B
2014 Nissan Frontier, Previous 2012 Santa Fe