Hey mate it's not a patch well it is but it's from the factory it's where the bladder is pulled out after the carbon has set and molded. Make sense even my enve rims have it.Yes, I had noticed the evidence of patching too, though I'm not familiar with how they should look brand new so couldn't be sure.
I'll go with the sanding option and see if I can get them smooth.
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Sweet.I reckon that's it sorted.
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