These are great for needing markers for smoke and vehicle damage results. Check out the links below. A big thanks to Ron Saikowski over at From the Warp for making these, and to Bloaterpaste for his set of markers as well.
http://fromthewarp.blogspot.com/2009/01/40k-counters-and-markers.html
http://bloaterpaste.imgur.com/40k_status_tokens