Laod Bhang & Co Fireworks – Rocket Factory Sign Being Repainted

The Backstage gate/entrance near the Stage Door Cafe in Frontierland at Disneyland has been redone and they are now repainting the artwork that was on the wall.  The sign appears to be the same as the old one (I included a picture from 2007 below).  Does anyone know the story of this sign?

Here is how the sign looked in August 2007