I guess it is possible that it isn't something clay could clean up. Clay isn't going to remove sap that has sat on the car for 10 years and petrified. It also won't do anything for rust that is coming up from underneath the paint. Clay isn't meant to remove the brown dots either. It is meant to remove the contamination that is causing the brown dots. You may still need to use a paint cleaner to remove all of the orange dots from the paint.