I am restoring a P14 that has been parkerized but I want to refinish back in its original rust blue/ black finish. When I removed the fore sight I found the original finish under it rust blue finish, somebody couldn't be bothered to take it off when it was parked.
I thought I will give this rust blue process a go, so I tried it on two pieces from the rifle. I have been using Ammonium chloride or Sal ammoniac which seems to work well but gives a medium dark grey finish. While boiling after 3-4 processes, i noticed that some of the rust has not blackened, why is this is the piece over done or should I reduce my boil time as I progress. Any of the experts out there can assist.
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