Slatwall Panels, Pegboard, Hardboard - Panel Processing Find Custom Wood Panels to fit your needs. Your wood panel manufacturer of choice. 50 years as a leader in custom flat panel fabrication. We help bring your vision to life. Panel Processing, a manufacturer, supplier and distributor of: pegboard, slatwall, pop or point of purchase displays, chalkboard, markerboard, hardboard and particleboard. Panel also manufactures, kitchen & bath cabinets, furniture, shelving and display & tile boards.