Rear caliper teardown

[PULS8T]

Hey all,
Has anyone teared down their rear 9n3 calipers. Need to pull mine down to get them powder coated. I've teared mine down to the point where only the piston is left to be pulled out. Doesnt seem to want to budge though. Is there something I'm missing?
Thanks in advance

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[h100vw]

The pistons unscrew?

[PULS8T]

Got the pistons out, they were just stuck. Ill post a few pictures later. One thing I'm unsure about

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[PULS8T]

Unsure on how to remove that

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[h100vw]

Unsure on how to remove that

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Never done it, I'd be onto google and youtube