Body solder is a type of material that people use to repair the body of an old car. It is a special kind of metal that is very soft when it's melted. Once it's soft, people use tools to mold it into whatever shape they need. Then, they let it cool and harden. When it cools down, it gets super hard and stays in the shape it was molded to, making it perfect for repairing cars.
It's like playing with modeling clay. When you heat it up, it's soft and easy to manipulate. But, when it cools down, it becomes rock solid and impossible to change. Body solder works the same way. It's heated up, manipulated, and allowed to cool down to create a firm and long-lasting repair.
People use body solder because it's tough and can handle a lot of stress. Cars come with age, and sometimes, they experience dents and scratches, which can make them look old. Body solder can help fix these problems and make the car look new again. Overall, it's a fantastic material that helps people restore old things, like cars.