What's the best way to go about geting realistic metals? I haven't seen it mentioned much. Currenly I am calculating my frenel term as a float3 with schlick's approximation, and different zero incident values based on the reflectance values you can get from here: (http://refractiveindex.info/)

Is this a close enough approximation? Are there better ways of handeling it? The colors seem about right to me, and the specular highlight turns white at glancing angles which seems right.