Today i was trying to use a soldering to create the effect of a melta hit, when i realized that it also works great to make scratches, bolter shots, phisical hits and almost and kind of battle damages or effects; the results are great and very realistic, and it's also very easy to do: just use the soldering like if it was a brush to "draw" holes and scratches, then paint them with Chainmail or something similar.
This is what i've managed to create at my first try: (still need to improve the paintjob
btw)
What do you think? Anyone else uses this technique? If someone is interested i will create a quick guide