Procedures and specifications are given in this section for inspecting, cleaning and assessing the wear limits of most components. Other procedures such as Magnaflux® and Zyglo® can be used to locate materials flaws and stress cracks. Magnaflux is a magnetic process applicable only to ferrous materials. The Zyglo® process coats the coats the material with a fluorescent dye penetrant and can be used on any material. Checks for suspected surface cracks can be more readily made using spot check dye. The dye is sprayed onto the suspected area, wiped off and the area sprayed with a developer. Cracks will show up brightly.