Coatings or paints are applied either to protect or to enhance the surface underneath. Engineers look increasingly to coatings to improve the product. Coatings on cars must be more resistant to scratches, while coatings on ocean-going vessels must prevent the growth of sea life on the hull in order to maintain speed and fuel efficiency. New coatings that are self-healing are also being developed to retain the esthetic nature of products for a longer period. If the resin mount sample holder is used, measurements and EDS line scan analyses of cross-sections can provide data on the thickness and quality of the coatings.