Can a Blued Pistol that has been Teflon Coated be reverted back to the original Blueing? Is there a process? I have a 1958 Colt Officers Match .22 that the original owner had Teflon Coated when the pistol was NRA 100%. I want to bring it back to the original rich Blueing. The pistol is in very good shape, no scratches or wear. Anybody know? Thanks.