Do not apply ANYTHING on your hands at all until the last day. Make sure you do not wash your hands more than just before meals and after returning from the restroom, spending no more than 2 minutes per wash. If you can, avoid washing your hand too often.

On the day of finger printing take Inderal 20 mg (Its a prescription drug, so you need a prescription from a doctor) one hour before the finger printing itself. Just before going, try cleaning your hands with an alcohol swab. There is no reason why you should have problem then.