Over the years, we experienced many cases where the repair, made by someone else, peeled off or, in the case of a crack, cracked again. We found that such errors could be prevented since the person who worked before us apparently did his best, acted in good faith, and tried to do a good job wherever possible. The cause of the errors is therefore to be found in the materials used for the repair and the method, which, in our opinion, is very easy to correct; all that is needed is a little guidance that any experienced technician can immediately apply. If you are struggling with problems like these, our training material can help you out. This booklet guides you through the steps and materials needed to fix common damages like cracks, broken parts, and sometimes chips. This guidance shows: - how we work, - what we do, - why we do it, - and what materials we use. This guidance contains: - Detailed explanation for each step, - Photos where necessary, - Examples of common errors, - Examples of the right process.