Anthony J. Ameo Jr. has been named president of Eckart America L.P., a leading provider of metallic and pearlescent special effect pigments, powders, pastes, dispersions and printing inks.      Mr. Ameo will be responsible for the overall operation of the company, which serves different industries including graphic arts, coatings and plastics.      According to Heinz Neidhardt, Eckart’s managing partner, “Tony Ameo is an experienced executive who has demonstrated an ability to lead and deliv...