This 4000x3000 .PSD file will "grungify" any image, logo, photo, text you put in the folder "Image". You can adjust 3 distress layers (marked in orange), disable and change opacity (use more of White distress if your images are dark, etc). Lower opacity for very subtle effects, raise for more grunge. If your image has a transparent background, then there won't be any "bleed" of grunge effect and it will only affect active pixels that you paste. That makes it great for logos!
Easy to use in seconds.