Check the listing for details. MAGIC - Roughing Fluid for treating cards by R. M. Tracy. Condition: Used, Made in United States. Listed at 9.99 USD. "MAGIC - Roughing Fluid for treating cards" by R. M. Tracy is a book focusing on a specific technique for repairing and preserving cards. The book likely provides detailed instructions and tips for using roughing fluid to treat and protect cards, making it a valuable resource for collectors and enthusiasts looking to maintain the quality of their card collection. With a focus on practical applications and expert advice, this book is sure to be a valuable addition to any card preservation library.