How to paint the buttons on the jacket if the paint has peeled off them?
Painted. With fine sandpaper, I removed the remnants of old paint from the surface of the buttons. I applied acrylic paint to the surface (several layers with intermediate drying of each layer). Then I covered the surface with acrylic glossy varnish for 2 layers. Excellent. The paint will not rub off.
It seems to me that it is better to alter the new buttons. Repainting the buttons is troublesome, and the result will be the same.