The model maker must be highly skilled in the use of many machines, such as manual lathes, manual mills, Computer Numeric Control (CNC) machines, lasers, wire EDM, water jet saws, tig welders, sheet metal fabrication tools and wood working tools. Fabrication processes model makers take part in are powder coating, shearing, punching, plating, folding, forming and anodizing. Some model makers also use increasingly automated processes, for example cutting parts directly with digital data from computer-aided design plans on a CNC mill or creating the parts through rapid prototyping. Hand tools used by a model maker are an exacto knife, tweezers, sprue cutter, tape, glue, paint, and paint brushes.