I ordered he kayfun in matte. Well, that doesn't match the Provape tank Ring and it annoyed me more than usual. So, I bought Sharkhide Metal Polish and took out my Dremmel which I never used before. If you don't have a Dremmel you could do it by hand, but it will take a long time. But now they match - thank god (or whoever)! 
If you want to do this, just plug the air and fill holes with tissue and practice on the middle metal piece first. The Dremmel saved me lots of time.
Before

After

If you want to do this, just plug the air and fill holes with tissue and practice on the middle metal piece first. The Dremmel saved me lots of time.
Before

After

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