Quote:
Fjamming previously said:
From what I've gathered from other posters in other forums, the markings on the plate shows that it wasn't machined. The back side of the rings look like the front side, which means they started with 1/2 in thick plates and was trying to pass that on as 5/8th.  |
Yup that's run and size stamp on raw alum.
You can clean that up easy. WD40 on a 00 steel wool. It WONT scratch, you will get a polished look and will burnish it slightly (won't turn white and oxidize to fast)
TRUST me on this, I have over 4000' of truss we do this to every summer..
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