Park chairs, often exposed to natural elements, frequently encounter tree sap, which can be sticky and challenging to remove. Manufacturers typically use materials like powder-coated metal, treated wood, or synthetic resins to resist sap adhesion. For maintenance, regular cleaning with mild soap and water helps prevent buildup. For stubborn sap, rubbing alcohol or specialized outdoor furniture cleaners are effective. Proper care ensures longevity and keeps park chairs looking pristine despite exposure to tree sap.