Here’s a nice, short video demonstrating a wash blending technique.
washes
Using Washes To Paint Your Miniatures
Advice on using washes to paint miniatures.
Speed Painting With Washes
This video is about painting orcs, but the techniques can easily be extended.
Using Washes To Create Weathering
Armorama has an article on using washes to weather your armor models. While its intended for plastic modelers, it also is great advice for 15mm and 25mm – 28mm gamers. I’m not so sure that it would be useful for anything smaller, though.
Making Oil Washes For Your Miniatures
Here’s a set of instructions for making oil washes for your miniatures. One key that I had not thought of is to first gloss coat your miniature for a smoother surface over which to put the wash.
I am seriously going to try this on my next batch.