We will have one when we meet again! 
yes you are right the anisotropy value is 0.3 it help the metal looks awesome but it made a spot in the spoon handle. i tried to remove it but i cant. looking for you idea Marcin
It’s a known issue, but possibly not fixable. Same thing happens in V-Ray and other renderers: https://forum.corona-renderer.com/ [Maybe a Bug?] Anisotropic reflection on capped cylinders #msg71290