if you mean this model - http://www.grindhousegames.com/products/hans-the-hunter He is my steampunk Joss!
...I wish I could find a way to explain how simple it was. I always assume 'the object lightens up whatever is closest to it' and try and find the most logical and balanced way to represent the areas affected.
Usually: enchanted blue --> enchanted blue + White 1:1 then --> more white to the mix for another 2 -3 layers, being as small on the detail as you can.
Hope that helps!