Metallic anisotropic reflections.

Hello fellows !

Another tricky question…
Do you know if it is possible to achieve anisotropic reflections like shown in the following image ?

The blender.org site shows such an anisotropic material, but on the whole object, and using nodes: I will need Yafaray for my project, so I can forget nodes.
I’d have to apply some kind of map to a metallic plate, on which the reflections let some anisotropy visible in some parts.

I’ll begin to play with that, but it seems quite tricky…