iii Preface Auto Collision Repair and Refinishing is an easy-to-understand, up-to- date textbook detailing automotive collision repair and refinishing. It has been designed to help prepare aspiring technicians for exciting and productive careers in the collision repair and refinishing industry. It also provides the information needed to prepare for the ASE Collision Repair and Refinish Certification Tests. The collision repair and refinishing industry has changed dramatically over the past several years. From laser-guided pulling systems to water- borne paints, many of today’s tools, materials, and techniques are radically different from those commonly used just a decade ago. Auto Collision Repair and Refinishing provides instruction on the latest collision repair and refinishing techniques, as well as more traditional repair procedures. This book presents both the theoretical and practical aspects of collision repair and refinishing in an easy-to-understand manner. Auto Collision Repair and Refinishing will give you the tools you need to succeed in the challenging and ever-changing world of automotive technology. The 2022 edition of Auto Collision Repair and Refinishing is orga- nized around the ASE Collision Repair and Refinish test areas and corre- lated to the ASE Education Foundation Task List. It has been thoroughly revised by the author and carefully vetted by a panel of instructors and industry experts, as well as a team of technical editors, to make sure the material is technically accurate, up-to-date, and presented in the most logical and effective manner. Auto Collision Repair and Refinishing has been painstakingly designed to provide a student-focused approach to learning. Short sentences, concise definitions, and thousands of color illustrations will help you learn quickly and easily. Information is presented using a building-block approach that starts with simple principles and general rules, and progresses gradually to more complex topics. As society transitions from printed textbooks to digital learning tools, we know it is important to provide the content you need in the format you need it in. The Auto Collision Repair and Refinishing textbook and the accompanying lab workbook are available in both print and digital formats, and are supported with professionally developed, user-friendly online resources. These resources include electronic study tools and interactive activities designed to prepare you for success in your studies and career. We congratulate you on your study of automotive collision repair and refin- ishing and encourage you to take advantage of all the resources available as part of the Auto Collision Repair and Refinishing learning solution.