Need a realistic rough metal texture

[avalys]

I need to replicate a rough metal texture in LuxRender. Approximately the appearance of the lead in this photo:

http://www.nuclead.com/images/leadpipe_420x280.jpg

I have not found an NK file for lead, but I assume the one for tin will appear approximately the same. The bigger issue I am having is how to replicate the somewhat randomly-scuffed surface of the metal. Everything I try comes out looking way too regular. This component is a fairly large part of the scene I am rendering, so it really stands out if it looks artificial.

I am using LuxRender 0.7.1, although I can upgrade if absolutely necessary. Any suggestions for something to try?

[Meelis]

Don't know about textures but there are some nk's in Sopra.

PBS.nk Lead Sulfide
PBSE.nk Lead Selenide

[Eros]

It is likely best to use a u - v roughness texture to the metal,
I have had nice results with this before
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