Strip and repaint hands

Try soaking them in a small jar of acetone, leave for a few hours and use a fine brush to see if the paint is softened.

If it has, repeat with a final rinse in clean acetone and allow to dry on watch paper.

Mount the hands on toothpicks (held in a stable base) and use a modeller's spray gun to apply very fine mist of paint, allow to dry and repeat.
If you have to use a brush, use a very fine artist brush and use model paint, use thinners so the paint isn't too thick. May need two coats.