MountainAir05 wrote:
Its just like a boat. Once you get the cracks, the only way to proper fix it is grove the line cracks and then clean and wash very good. Then Resin and gel coat over. Should last many years. If you don't fix now water will get threw them over time and a bigger issues down the road.
You might ask about replacing with a new panel or clean and glue down a rubber membrane over the panel. Look at the cost each way.
I think you might find the fiberglass is so thin grooving it out really isn't an option. The material on many of these roofs is so darn thin there really isn't anything to groove.