bullet holes

  

get your texture/interface then make a new layer and pick black for the color then pick the airbrush tool and chose the 4th smallest brush and make a couple dots for the middle then choose the 1st and 2nd smallest and make lines go away from it like in the image

now grad the layer with the lines(probably layer 1 for you) and click and hold and drag it down to the middle button at the buttom to duplicate it

now choose the move tool

now hold control and click the first layer and with your keyboard hit the down and left arrow once each, then click preserve transparentcy and fill it in with white

now you're done, you can make it look better even more by in the layer window where the pull down menu that says normal change it to soft light or hard light.. the texture i used wasn't that good but it should look real good on interfaces