Book excerpt: This book is about finding out why our cars corrode, and what we can do to stop it. Some of you may collect cars because you are passionate about the industry. Some of you are just trying to keep the car you drove your first love around in high school alive. You may be trying to remember your grandfather properly, or you may be trying to keep a car in shape to protect your monetary investment. Whatever your reason for keeping the old car around, I want to help you do it.