Clay after roof
Clay shouldn't be that dirty unless the car hasn't been properly decontaminated beforehand. What were your steps prior to claybar?
Rinse, snow foamed left to dwell for 10 minutes while attacking the shuts etc, rinsed then I hit the lower panels with bug and tar remover, the car was then washed using the 2BM, rinsed, snow foamed again, rinsed, clayed......
Tbh the car has done 44k and I don't think it had seen a bucket and sponge since it left the factory in 2007, the number of visible tar spots was incredible and it was parked under a cluster of trees on the previous owners drive which didn't help.