Is it proper English to say I have never seen you wore or worn before?

No, that sentence is not grammatically correct. Here's why:

* "Wore" is the past tense of "wear," and "worn" is the past participle. You need to use the past participle in this case because it's part of a present perfect tense construction.

Here's the correct way to say it:

* "I have never seen you wear that before."

This sentence uses the present perfect tense ("have seen") to express an action that started in the past and continues to the present. It also uses the base form of the verb "wear" because it follows the auxiliary verb "have."