Mary: Oh! how pretty -- a silk headboard!
Maybe this will help
It would be tricky to paint on silk not impossible but tricky, but I would use a latex paint and try on an inconspicuous section first.
Here is how to paint a headboard with chalk paint: https://www.blesserhouse.com/beginners-guide-to-painting-upholstery/
I hope this helps:
Real silk will take a lot of different kinds of paint.
Polyester “silk” will not take water colors paint nor tempra paint unless it has acrylic added to it.
I also wouldn’t use oil-based paints on it, unless you can try a test sample to see if it “melts” the fibers.
Hi Mary, here are a few items I found, hope they help you out, this first link tells what type of paint to use
Here is a spray paint video
Chalk paint on fabric