capt14k,
I have to wonder who perpetrates some of this mythology. Import marking criteria was put in place in 1968 and is the same for ALL firearms unless a marking variance is applied for and approved by BATFE. Serial numbers must be 1/16" font and other markings can be smaller as long as it's legible. 1/32" is as small as it gets to be legible to the naked eye. Any engraved markings must be applied to a depth of three thousands of an inch. As far as local ATF compliance inspectors giving solid advice on import matters, I can assure you it isn't the case having been inspected here many times over 25 years. The criteria comes only from BATFE Imports Branch and Firearms Technology Branch. Removing import marks as required by Federal law IS illegal.
Brian