You cannot apply anything on the area of injury except what is recommended by the Plastic surgeon.
An antibiotic or antiseptic cream may be indicated. This along with oral anti-biotics should cause the wound to heal well.
Once it has healed, depending on the type of scar left behind, further management can be decided upon.
At this stage, keeping the wound free from infection is the most important thing so as not to interfere in the healing process.