I wouldn't worry too much. Stickers usually don't do much to hard plastic, as we have been using stickers on plastic toys for more than 3 decades already. And the tape can be taken out or replaced anytime if it does shows sign of aging or damaging the fake leather inside. The leather of Kenshiro's Jacket double layered and is much better than the material Medicom used years ago. Its a lot more fabric-like than synthetic rubber sheet. So I doubted the tape can damage the fabric much. But I'll keep that in mind, and thanks for the warning.