I regularly visit a number of model making web sites, and one of the things that has interested me lately is a weathering technique called 'Chipping'. Chipping is, in it's simplest form, the technique of representing the bare metal that appears in worn down areas of a vehicle.
There are a number of different methods of chipping, but the one I've been using on my Chieftain, in my opinion, is the easiest but one of the most effective ones. Simply put, it is just a matter of using an ordinary graphite pencil (in this case a Staedtler HB) to, quite literally 'draw on' the bare metal effect!
Here are a couple of pictures, the 'Chipped' areas are the areas which appear to be shinier than the rest of the model.
The next thing I will be doing is to finish off the weathering of the tank's tracks.