I agree with you 100%, properly preparing the metal is critical in cerakoting metals and plastics. I have read the procedures furnished by the manufacturer (NIC Industries) as to properly preparing and applying cerakote and have never read that they recommend parkerizing anything prior to applying cerakote. Is there another supplier of Cerakote or possible a better way to apply it than is recommended by the manufacturer? I only belabor this point because I want to supply my clients with the best job I can, one that looks good and lasts. Regards, MPickle