Re-create this whimsical, spider-woven manicure for Halloween using just an art liner brush and black and white nail polish. To achieve the cobwebbed look, start by prepping the nails with a base coat, followed by two coats of black nail polish. Once dry, use a thin art liner brush to sweep on two to three diagonal lines from corner to corner. Finally, connect the lines using U-shaped strokes. Only one coat is required to get a gossamer, see-through finish. And don't forget to seal your design with a top coat. Optional: Add a spidery detail on one nail for a frightful finish, or try using glow in the dark polish for an incandescent effect.