yeah, you just brush some dye "penetrant" on there. It's thin like water, and you would only need 1/4 cup or so. Then you wipe it off, or wash it off with brake cleaner on a rag. Then you lightly dust it with the "developer" powder (which just looks like white talcum powder to me), and the dye will seep back out of the cracks, and will be readily visible to the naked eye. I don't know for sure, but it doesn't look like it's very expensive, and it doesn't take any extra equipment, or much expertise to use.
