If you can remove the paint from the roof of your car with a fingernail, it would suggest that the paint has failed completely and will need to be repaired. It may be that it is only a section of the roof that has delaminated which would reduce the cost of the repair, but it may be that the whole roof would require a respray.

We would suggest contacting some local paint specialists who can take a close look at the area and give you an estimate for the repair. We would always suggest obtaining several quotes to get the best possible price.