Interesting observation (in case you ever need to remove bluing): I was using an old joint compound blade to spread Titbond wood glue on a project. The blade is at least 18 years old, and is blue - I assume this is blued finish to keep it from rusting. I am also assuming it is similar to the way a gun is blued.
Anyway...I got focused on the glue up, and forgot the blade with glue on it. Went to wash it off about an hour later, and here is how it looked:
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Blueing.12.jpg 112.98KB 5 downloads
The bluing at the front edge is gone! So if you are doing some kind of restoration and need to remove old bluing, it seems Titbond II wood glue will do the job. My limited research also turned up vinegar as an option, but that will leave a light film of "rust".
If I am completely confused about the bluing, let me know.
Another side "gun finish related" observation - I picked up a set of deep wall impact sockets at Harbor Freight. Got them home and realized they were not "shiny" at all. I noticed the black finish looked a LOT like a parkerized finish. So, I hosed them down with balistol and then cleaned them up with a rag. Any smart people out there to answer the questions: 1)Are the sockets parkerized? 2) Is it THAT cheap to parkerize things, and 3) is it accurate to say that the parkerizing does nothing for protection unless you oil it?