Contract for the resurface...?
Why. Make the original guy repair it on his own dime.
The flight deck wears from normal use and weather just like a road surface. All flight decks get resurfaced on a regular schedule and is typically contracted at the ships local port. Out of schedule resurfacings occur when abnormal damage (accidents, etc) occur. In this case it will likely be bad mix, improper prep, or contamination. Given it was surface flaking it is likely mix or contamination - sumitomo will do again at no charge and lose some smaller ship work to Yoko and other ports for a short time.