Wooden walnut Zippo lighters belong to the category of gifts, and the best maintenance method is to use less and maintain more. The wooden shell is afraid of falling and easy to get wet, and the overheating of Zippo for a long time will also affect the shell. The best way is to use it occasionally at home, and you can put some furniture wax and so on after a while. Another kind is to play when you have nothing to do. After a long time, you will not be afraid of cytoplasm (but it will take several years)
Note: Steel and copper are made by punching machine, which is a masterpiece of the foundry.
Plastic products are the works of injection molding manufacturers. .
If necessary, you can contact stamping factory or injection molding enterprise. . They have molds.