Collocations for polite - adj.

be, seem, sound
remain

extremely, fairly, very, etc.
perfectly, scrupulously, unfailingly
overly (esp. AmE)
an overly polite smile

coolly
His manner was coolly polite and impersonal.

to
She was scrupulously polite to him.

Polite is used with these nouns:
applause, convention, conversation, cough, greeting, interest, letter, manner, refusal, reply, request, smile, society, word