How would you separate these two ???

i wouldnt separate it at all that could get you hurt or you will never get it coiled back tight enough just paint it or tape off what you dont want painted

this!

once you get it off that silver post its going to uncoil from the center. option b is to have 2 people do it. once to hold the bracket and one to hold the spring then count how many times you have to go around uncoiling it before all the tension is off. then paint and coil it up the number of times you had to uncoil it.

i like the mask off and paint option