In answer to your first question, I'm away for four weeks so can't check. I would bet though that they're painted satin black under all the grease, like the rest of the interior metalwork.
Secondly, I've been researching a rubber equivalent to replace the outside felt on metal strip which is now unobtainable. So far, the only one I could find comes in 1 metre lengths, not long enough. I've been looking at using two narrow felt strips screwed to the wood, in place of the original item which as yoy will know is a metal strip with two felt strips, the whole thing screwed to the wood.
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