DIY Crack Checking?

The 3 part crack check with spray cans is a cleaner like carb cleaner, penetrant, and developer. I used to use it a lot for quick check of mining parts and used Magnaflux brand if I remember. I did quick look on ebay and found penetrant Dynaflux PHF Penetrant Crack Check Inspection Grade 9.4 Oz. | eBay , and developer: Cantesco D101-A - Dye Penetrant Standard Developer, 12 oz Aerosol Can . The heads will have to be clean of grease, oil, carbon, and loose paint. Best to have pressure washed then spray with cleaner and wipe clean. Spray penetrant liberally and let sit for 10 minutes for penetrant to soak into cracks. Then wipe off with rags, do not spray cleaner on head or parts, spray on rag and wipe off penetrant. Then spray the developer on head to draw out penetrant if there is crack. Some welding supply stores carry the dye crack check spray.