Fantastic...sounds like just my cup of tea...Ok then, to perform the technique known as drybrushing follow these instructions
1: take a small paint brush
2: take a pot of paint of the colour you want
3: dip brush into paint
4: wipe off all the paint on the brush onto toilet paper or a copy of the times (same thing you see)
5: brush lightly over the raised edges of the object
this will leave a light coating of the paint colour on just the edges, giving you a weatherd or worn look