I have recently acquired a 1973 vintage Combat Commander chambered in .45 acp with the "Colt Guard" satin nickel finish. The arched MSH has a lanyard loop that has the same finish. My question is this: Would the lanyard loop be factory original? Also, is there any process (bead blasting?) to hide/remove the "Idiot" scratch? What type/color grip panels would have originally been on this pistol from Colt? Thank You in advance for any info.