Name two common primer types and their primary purposes.

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Two common primer types are epoxy primer and filler/high-build primer. Epoxy primer is chosen for its excellent adhesion to metal and its corrosion resistance, giving a durable base that protects bare metal and over-welds. Filler or high-build primer is used to add thickness and fill minor imperfections, leveling the surface so the final color coat goes on smoothly. In practice, you’d usually apply epoxy primer first for protection and bonding, then use filler primer to even out the surface before sanding and applying the topcoat. Other primers exist for specific tasks (like self-etching primers for initial bonding to clean metal or zinc-rich primers for sacrificial protection), but the combination of epoxy for adhesion/corrosion control and filler/high-build for body and surface smoothing best covers the main needs in a typical refinishing workflow.