Shamrock Partners with Italian Retread Specialist Marigo to Provide Innovative Solutions. Shamrock leverages our relationships with experts worldwide to provide your retread business with the most up-to-date equipment, processes and tools. That’s why we proudly offer a full portfolio of mold cure equipment from leading European manufacturer, Marigo. For over 50 years, Marigo presses and molds have been used to retread tires for cars, trucks, OTR, aircraft, and more.