Quote Originally Posted by ZRXNige View Post
I believe it can and there is also debate over which blast medium is most suited (but that's another debate) but as for temperature, I dont think plastic coating would exceed the heat required to adversely affect the springs metallurgical properties....
Thinkin' and beliving doesn't cut it. Important is how tightly people control their process. I've seen aluminum casings melted by a coater, oopsie ovens thermostat malfunction. Some of spring steel have top working temperature limit as low as 120 C...
Media blasting is a mutter, nobody's going to blast yer springs with steel shot to cold work it.