Yes, it was pretty much its only substantial refurbishment. It's when they changed the color scheme (brighter pink and two-tone roofs.)
In Walt Disney World, they repaint Cinderella Castle from a cherry picker. But all that intricate aging and shading on the Chateau requires scaffolding, apparently, and besides, at this point in its decay they'd need to Bondo half of it. It will (would?) be interesting to see if they decide to change anything again during the next refurbishment. I presume a date still hasn't been set, no vague and half-hearted promise been made?