Hello! I have a unit in the repair bay that has many small holes in a Crane fiberglass roof. Largest diameter is about 3/8", but there are many that are approximately 1/16" x 1"-2" holes as well. There is no plywood under this roof material, only high density extruded foam insulation. Is there a recommended prep to repair the holes before applying the roof magic? We are prepared to just replace the roof, but a technician here is curious to know if we can save what's there.