Any ways to damping metallic snap fastener domes afterwards? I bought  handmade cushion covers, but what I did not realize to expect was that at the back, they're closed with a row of half an inch wide snap fasteners, and their metallic dome backs protrude.



On a typical fabric sofa, this would probably not be a problem, but I meant them for an armchair with quite sensitive faux leather upholstering on the arm rests, and I'm afraid that the metallic caps could end up scratching or even breaking the puffy but relatively thin and elastic leather.

Is there anything that I could do about this without having to consider removing the snap fasteners completely?
I suggest concealment. Take a strip of very fine leather and sitch it over the line of metal domes. You might be able to find a cloth that would do the same, but the combination of suppleness and toughness needed would be hard to find in a woven product.