December 10 build date Dearborn plant.
Would the coil clip be phosphate and oil ?
"Coil clip"? Would that be the coil bracket? I have a coil and bracket sitting on my desk. The coil is a "glossier" black as is the bracket. The coils has a date code of "5CDC" (?) in silver stamping ink and some of the stamping has transferred to the black painted bracket. Sorry, don't know which plant.
Other examples indicate the bracket to be "sort of natural/phosphate and oil", which I believe was more the case for 1967 models. The special bolt and nut clamping the coil should be painted if the bracket is. The original bolt/screw apparently does not have a Ford hardware part number. I've assigned it "UNK23" for use in the spreadsheets (service is 27185-S2(or -S8) but that is incorrect, different head). The nut is 34079-S7. Your choice on finish.
Same question for the bottom trunk striker plate latch ?
My first attempts on the trunk striker were to plate it a clear (shiny) zinc finish, then try to "dull" it. About 5 years ago, a "dull zinc" finish was introduced in the plating industry (my zinc plater is second generation, and I used his father's shop 30 years ago when I worked for a living). Dull zinc "replicates" a cad finish (OSHA controls this process very tightly) and/or galvanized, but I don't see the "garbage can" type galvanized finish on the striker.
Read "Phosphate 101" in "Process, Products & Techniques" in the library before, and during, any Phosphating is attempted.
Jim