wrinkles in vinyl

What's up guys?! I just recently vinyled my fiberglass box, and used 3M adhesive. For the most part, I am happy with how it came out. However, there are a few small wrinkles here and there that bother me, and without ripping the entire vinyl off the box, there is no way to spray behind the vinyl with adhesive. Is there a way to get small wrinkles out of vinyl? Steamer? Heatgun? Or am I just plain ole' screwed?

Heat gun....warm it carefully, lift it and re-apply. Hopefully its not in the center section of a large piece of you box....that makes it a bit more difficult.