Words of Sanctity in 'Elokai Netzor'

Hello, A person who has recited the blessing 'HaMavarech et Amo Yisrael BaShalom' in the Amidah prayer and is in the process of 'Netzor Leshoni MeRa VeSifatai MiDaber Mirma', can he respond to Kedusha? And if so, which parts of Kedusha does he respond to? - Does he say 'Nakdishach VeNaaritzach'? - Does he respond to all parts of Kedusha afterwards? And another question: does the answer change if he has completed 'Yehiu LeRatzon' and is only in personal requests?

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