Composites cover a wide range of compositions, general grouped under the subcategories metal-matrix composites (MMC), polymer-matrix composites (PMC) and ceramic-matrix composites (CMC). Consequently, preparation schemes are quite difficult to generalize due to the extreme range of materials employed, differences in hardness and grinding/polishing characteristics; so, relief control is a big issue. Pull out problems are also very common, especially with PMCs. Sectioning frequently produces considerable damage that must be removed in the initial preparation step. Mounting with castable epoxy resin along with vacuum impregnation is frequently performed.