1.)Open up a completed signature (if you don't have one follow this tut)
2.)Now create a new layer and fill it with black. press control+j 3 time so you have 4 black layers above your sig.
3.)On all of the layers go to Filter>Noise>Add Noise and make sure monochromatic is checked. For all of the layers make the noise somewhere between 200-300.
4.)Set all of the black layers with noise to overlay
5.)Bring the image over to imageready
6.)Hide all layers except the sig and the bottom black layer, click new frame this time hide the bottom black one and choose the one above it to be visible
7.)Then do the same 2 more times and I got this:
