Warranty advise

[Borys]

Guys I have a couple of jobs on my car which don't really drain my pocket off.
I do have an aftermarket warranty on the car for another 12 months. D'like to use it but never done it in my life. My front shocks need replacing, they do not leak but can hear them knocking (suspension is new so they are to blame). Also new ride hight sensors (one was badky corroded and cleaning it did not help). Will it be straight forward process? Will they let me use my trusted mechanic (don't want no one else touch it)? Also for shocks happy to use refurbed units (will they allow it)?
Will call them next week anyways but d like to hear other experiences
Is it a waste of time?