Remove skin from cooked ham. Place in roaster, fat side up. Bake at 325 degrees for1hour basting frequently with mixture of 1 cup ginger ale and ham stock. Remove from oven. Cover with a paste made of 1 cup of brown sugar of 1/2 cup molasses, 4 tablespoons all-purpose flour, 1 tablespoon dry mustard, and 2 tablespoons water. Dot with cloves. Return to oven uncovered and bake 30 more minutes.