Wood is often protected by plastics. Acrylic wood finish and paint are plastic. Particle boards such as those in many Ikea furniture are covered with a plastic

Wood is often protected by plastics. Acrylic wood finish and paint are plastic. Particle boards such as those in many Ikea furniture are covered with a plastic sheet. If you don't use plastic you need to switch to solutions requiring more maintenance and offering less protection like vegetable oil or pine tar.