He can fix it but he would then need to repaint the side pocket. I seldom carve decorative decoys. Working on a full size common loon in "dabs and dribbles" right now between decoy order filling.
For what it is worth: there are two types of lung cancer-small cell and large cell. Small cell is the most aggressive, spreading quickly and shedding to cause metastatic tumors in other organs. Consequently, it is generally deemed inoperable, with the management course usually palliative care. He likely has large cell. His probability of five-year survival is far better.
Please convey our best wishes to him for a for a speedy recovery.
As a two time cancer survivor, I am a willing listener, should he opt to want to talk...PM me for receipt of my contact information, now, or down the road.