which way to the beach?

So, this is my latest flea market find.  There used to be a mirror hanging over this table at the beach house, but I took it down and hung this old freeway sign in its place.  I absolutely love it.  The family had mixed reviews.  One little granddaughter told me she liked the mirror better, but her mom pointed out she probably just liked looking at herself.  The real debate was over whether or not to wash it.  I didn't even think about it when I hung it up, but everyone was very opinionated as to what should be done with it.  What do you think?