Fluoro-Finder III Tracer Effectively display the coverage after shot peening/blasting process. Mirroring the uniformity and completeness of the shot peening process in a direct visual way. Help avoid 200% coverage for complete shot peening. Meet specification AMS-S-13165, GE D50TF9 A Rev.S3. Get liquid form by blending with methyl ethyl ketone(MEK) Paint it on the part surface, and then wait until it gets dry before starting shot peening process.