Objective: How to stain the basic body of a wood guitar.

Which of the following solutions is more sound in terms of naive physics reasoning?

Available options: 1). Use painters tape to cover anything you do not want stained and then use a brush to apply the stain over the entire area and allow to dry overnight. 2). Use painters tape to cover anything you do not want stained and then use a brush to apply the stain over the back and allow to dry overnight.
1).