Lupe...You can spray paint, mod podge l ply napkin or wrap wired ribbon horizonally around them.
Lupe: maybe this will help
Hi Lupe: Do you already have the ribs? The inside part and just want to put different fabric on them? Here are some sites that may help:
I had fun covering one with rust dyed fabric https://vickymyerscreations.co.uk/tutorial-2/how-to-make-a-fabric-lampshade-cover/