Decals on Mesh Surface

Hello,

I am experimenting with adding some slash and blood decals on a UMA character when hit by a sword. The decal does appear on the sphere or box colliders that parts of the body have, but those may look really off as it is hard to match the surface of the mesh with the generic colliders. Is there a way to form the decals on the surface of the mesh instead of the collider? Or is it possible to have a mesh collider for those bones?

Thanks.
 
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