OK, well here are the pics now that I found time to over to my buddy's house and finish degreasing the action and re-assemble (he has a parts washer and it makes cleaning cosmolene off metal EVER so much easier. I still detail strip the action to clean the recesses and check for parts wear/breakage, but parts cleaners = good stuff.)

You can real see around the rear sight ears that the finish (which looks like very dark green parkerizing) is really some sort of applied coating. Paint stripper doesn't touch it. Also, some parts of the underside of the receiver are clearly NOT coated and are a black phosphate finish. The barrel is blasted (or shot peened?) and parked a dark greenish. The bottom metal is parkerized, but not blasted. The bolt is blued (cocking piece in the white). Safety retainer block is blued, as are safety, rear handguard retainer, front sight, and the non-polished parts of the rear sight. Both barrel bands are parked, but not blasted. Same for buttplate.

Every part is E-marked. Not mixed-maker parts anywhere. (as an aside, the Kerr is a WPG repro)