Seclusion has yielded"“Dorito Polyhedron’’ (Buckminster Fuller meets Frito-Lay) and ““Shorts’’ (an exten-sion cord woven into a pair of boxers). His new show (up through March 31 at L.A.’s Ace Gallery) features timepieces fashioned from some toothpaste and a hairbrush. What do they mean? How about: for Hawkinson, the future is now.