Radial blur on an object, how to?

Unity Engine
1

Hello,
for my second post I really would like to know if shaders is the definitive way to go to perform radial blur on an object (not on the full screen as a post processing effect).

Example (look at the title, note: this is done using an other trick here):

Thanks in advance!

WS

2

Its much easier with a shader rather than extruding a mesh out with transparency like in that image.