If you're building from scratch, Cubase or similar software allows you to layer "Lego blocks" of sound to find the right direction.
To live up to the name "Rusty Nail," the music should reflect the qualities of the object: metallic, aged, sharp, and perhaps a bit dangerous. Rusty Nail - Instrumental
Use "biting" guitar tones or distorted synth leads to mimic the "metal" aspect. If you're building from scratch, Cubase or similar