There are a couple of sites with blending on it. Hot Lead and Dr. Faust\'s Painting Clinic. Both can be found searching www.google.com I forget the web address. Both do it very differently. One does wet blending by mixing the colors togethor. The other does it by watering the paints down to translucent quality and painting in layers. I have found wet blending is easier for me to do than Dr. Fausts method, but he does it extremely well look at his gallery sometime
Wet Blending is a simple idea but it takes alot of practice to get the kind of look these pros are doing it. Basically how you do it is to blend the areas between shades where the two lines meet so that you get smooth grades between the transition of colors on the model. You work the area with the brush about to mix the paint togethor. The pros do it to a super fine grade but I am content with some large swirls with the brush where I get a mix of the two colors between the areas meeting.
I generally do blending alot different by mixing the colors into each other more while it\'s drying. I just can\'t get into the fine details to create the gradients needed to do the blending technique correctly but I am happy with the results I get with my style of blending and use it on just about everything I paint now.
The best way to do it is to do it. I do my blending in small area. I will paint the top of an arm, and then work in the highlights while it is drying. This way it doesn\'t dry out to fast. The problem is I get slightly variations of colors between each section I do because I am doing it in small sections.
You can paint a base color on the area (like a cloak) and wash it to see the details and then working across the model choose small areas at a time and work the paints togethor mixing them. See Hot lead painting site for detailed information on how he does his blending his minis are really nice.
The other way you are on your own I have given up for now trying it everytime I do it I get soup or it looks like leprousy.
peace