Thanks to Dan P's post I was able to create in POV Ray 3.1 
a brushed metal that looked very similar to the "before" picture, which I
was entirely happy with. But I have since upgraded to POV Ray 3.5 and the
EXACT same settings produce the horrible mess in the "after" picture. My
normal settings are:

normal {
   granite
   0.1
   scale <0.1, 20, 1>
}

I've tried changing changing the depth, scale, rotation, bump depth,
accuracy, noise generator, and turbulence but I can't achieve the same
effect in 3.5, what am I doing wrong?

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