Custo Barcelona’s Custo and David Dalmau have been riding fashion’s proverbial coattails since their patchwork T-shirts became a commercial hit in the late-Nineties. These days, their kooky get-ups appeal mostly to the Euro and Latin underground club subculture, and for fall they continued on the same path — a mishmash of fringed woolens, faux furs, metallics and astroturf-like fabrics. By now the effect is more parody than fashion.