i just purchased a 45cal 1911 from rock island armory $369.00. seems tight,looks good,handles good. BUT finish is very poor. i did a clean up when i got home and the recoil spring plug is showing bare metal already on end and from just thumb pressure during disasembly. also slide has bare metal showing like a scratch. all this is fine except i only used my fingers and a rag and oil to clean gun. is this normal wear rate for a sarco rock island gun finish? any one care to comment?