Problem with Deck Railing Material

[Gayle Sanders]

I want deck and stair and railing to be a wood tone and balusters black. Material defaults for deck railing and railing are are wood tone rail and black balusters. Vector view displays correctly, but render view shows deck railing all woodtone (no black balusters). I have tried deleting deck railing walls and building new ones (plan view shows extra lines on both sides of the new railing wall). Deck railing default for baluster was initially wood tone. First I changed baluster material for each railing (no black balusters), then I changed deck railing/railing defaults. I have also defined black "balusters" in default settings/materials/general materials. A curved portion of the deck railing (around opening for tightly curved stairs) is not defined as a deck railing, but a railing. That does have the black balusters. I used deck railings not railings to define the deck because I wanted the advanced framing. How can I control the rendered color of deck railing?