Trying to find a source of bright steel strip with a section like the picture below, size is about 16mm x 3mm maybe 15mm x 3mm

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The rounded sides are critical.

I can get it in hot-rolled but the mill scale makes finishing a ******, this is for scroll-work and the scrolling cracks the scale off randomly.

Pickling would be trick as its 4m lengths :)

Pickling the finished item would not be good as the juice would get in the joints and wreck the powder-coat.