The liquid adhesive remover provided in your kit can cause damage if it contacts the MacBook Pro's display or keyboard.

To protect your display, place a sheet of aluminum foil between the display and keyboard and leave it there while you work.

Additionally, use some tape and/or foil to seal off the area under the trackpad. Optionally, you may also layer an absorbent towel directly underneath the trackpad area to soak up any excess adhesive remover.