BK,
I use it on heaps of lures, and have found it to "stick" well to hard body lures. I like putting it on slow moving lures, as think it may make the difference between a "not sure fish" to one who hits the lure out of even curiosity or mistaking it for a different smelling food.. Hope that makes sense.
When putting it on the Bony Breams I run "S" down the back on top, but not the sides, as it can slightly take some of the flash away from the lure
Have fun with it and experiment
Matt