I was reading through the Zenith construction standards and there was a mention of the need to remove all cutting marks as they may be stress risers. That makes sense to me. I wouldn't consider extrusion surfaces to be smooth. They often have lines that show the direction of extrusion. Do these surfaces need to be polished or brushed as well? Is that common practice?
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Do extrusions (non cut side) need to be polished?
- Thread starter SamP
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