Shiny surfaces can spoil the realism of any model railroad. Shiny surfaces can make structures and rolling stock look fake as though they have just come out of the packaging.

A simple way to remove that shine is to overspray the structure or rolling stock with Dullcote (Testors #1260 clear flat lacquer overcoat). Dullcote is available at most hobby stores/model railroad stores and comes in a small spray can like many other model car paint colors.