Cut edges, penetrations, and field modifications are part of the finished roof system. Their treatment should follow the selected product's instructions. A factory finish does not make every field alteration automatically suitable.
What to do next
Ask how cutting, debris removal, and exposed edges will be handled during installation. Retain the manufacturer's care information. If corrosion or staining appears later, document its location and obtain an assessment before applying a coating that may conceal the cause.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.