Do springs go bad?

[72K5NTX]

I am about to tear out the front end of my 72 K5 for a full re-do and was wondering what you guys think about replacing springs or just bushings and bolts?

Bushings are shot, replacing them with poly and greasable bolts from ORD but I wanted to know what you guys thought about the nesscesity of replacing springs. I always thought that if they were bad they would just break. These are the original springs.

Also any suggestions on paint for springs and front axle? Chassis black? Por 15?
This is a driver that is getting a frame on resto and believe it or not I've got a budget so powder coat is kinda out. Besides I love it too much to have it down too long.