When covering sheeted surfaces, do this:

Iron the covering around the edges (about 1/8" - 1/4") pulling slightly but not stretching.
Use a heat gun to pull the wrinkles out and tighten the covering.
Do not iron the sheeted surface more than you can help. The wood grain will show through, and it will wrinkle easily.

Use enough covering so you can grab it and pull it around curves. Heat, pull, lay, heat, pull, lay.

Practice, practice, practice.

Dr.1