Is it ok to remove a wart on my arm with plantar wart remover?

Yes: Yes but make sure you are dealing with a wart and not some other type of dermatologic lesion. See your dermatologist.

Several treatments.: You can try over the counter wart removers, but be careful: i've seen them do more harm than good. Other options your doctor might offer include cryotherapy (freezing the wart), electrocautery (burning the wart), laser treatment, or several different topical chemical treatments. If the treatment is typically uncomfortable, your doctor can numb the area before proceeding.