Powder coating springs

Rear Nitron failed with a clunk on the S2. Whilst I am having them serviced I can get the springs repainted. What’s best? Is powder coating ok or does it flake off?

Powder coated mine about 9 months ago still look pretty good to me…but I think most coatings will deteriorate quite quickly in the harsh environment of the suspension.
Was not expensive to blast and recoat so could be a regular refurb.
I repainted the spring data so I know the details in future .