This is why Townshend audio applies rubber. Actually it’s the air inside the rubber with a vent that damps the spring.
https://www.youtube.com/watch?v=OZxi1oZfvDA
geoff, I didn’t know you are using a hammer on your super springs when music is playing :).
I like this one also:
Plus the springs under load are constrained from ringing, like using your fingers to stop a tuning fork from ringing.It's a good one.