I think you can use more than one, author. When I came up with this idea, I just intended at least 4 pxl stock. But maybe you are having issues with your computer slowing when using that many layers.

Only nitpick would be to maybe made the 12 stand out a little more. GL!

Thanks jawsh, your right, looks better. When i said i was having trouble using 4 stock pics, i meant finding stuff to fill my scene with, which would look right...i've looked through countless images...

Great comp idea..Thanks.

I uploaded more. Go browse

Oh I suggest resizing the"12" to a smaller size and remove the drop shadow. instead, duplicate the "12" layer, make it black and Use Gaussian Blur to about 4% and keep it under the original "12" layer. It will look more like a stenciled "12" sticker, as if it was put there by a body shop.

Ah! Ya see? Second layer with the gaussian blur looks much better now. GL author!