Here is a WILD tip we read about in our favorite magazine, Real Simple. Next time your Van Gogh is too dusty to show, grab a slice of white sandwich bread! Yes, pick your jaw up off the desk we are talking about Wonder Bread and it's ilk. Not sourdough, not dark rye, not pita, not focaccia. Take the slice and glide it over the surface of your oil painting to remove dirt and dust.