I would suggest not spraying directly on, even with just hand pump pressure. Spraying above, and letting the "mist" settle down and build up to the desired level would be the method I would try, first, anyway.
Spraying directly on or at MIGHT result in scattering what you don't want scattered. I don't know, and am only generally familiar with what you are working with.
Try different things, different methods of application. When you find something that works, great. If you don't, keep trying different things. It all any of us can do. Hope this helps.
Good Luck, enjoy shooting!