A beauty is about to take center stage on K Street Mall. She's not quite ready for close-ups yet. But passersby are starting to get glimpses of the historic Crest Theatre's new face. Renovation of the theater's landmark art deco sign is nearly finished. YESCO sign company finished reinstalling the "CREST" letters above the reader board Wednesday. A total of 42 new and repaired neon light units are almost done, said Sean Ward, the company's service sales representative on the project. The blade -- consisting of sections known as the tower, the leaves and the candy cane -- and the marquee, with its reader board, have been repainted. This restoration included painting the roughly 90-foot