Salt technique?

It worked well for me. I posted my results in that link that Bek13 suggested.

Here's the BRDM that I used the technique on. The vehicle is Iraqi, originally a Russian vehcicle, so the salt chips reveal the Russian Green under the Iraqi Sand.

Try this:

http://www.finescale.com/fsm/community/forum/topic.asp?TOPIC_ID=3497

- or do a forum search on "salt technique...

Never heard of it, but that doesn't mean much. Maybe some one else here knows about what your reffering to. Sounds interesting whatever it is.