can you have outlines on mesh similar to the outline toon shader for iPhone?
there is a simple and the 1st method which came out long time ago before shaders where solving it:
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make inside your 3d modelling app a copy of the object, it will be the one you want to be outlined
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then flip the normals of it
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finally you need like in 3dsmax a so called “push” modifier, which blows the object from its vertex informations to all directions, and scale it to your desired dimension! the more you push(scale/blow) it, the thicker the outlines will be! if you have a simple object like a cube or a sphere, a normal scale into all directions (x,y,z) is enough too! but with more complex objects like characters i suggest you to use such a “push” or “blow” modifier!
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then export it
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import the object to unity
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give it your desired material
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put it over your original object. and there you have it! Works 100%
hope that helped =)