Of course you won't like my answer. It reeks of being excessive.
You should have bought 2 of them. Then test aged one to see how it looks.
We had a guy who sat with us at some of the gun shows. He basically doesn't get along well with anyone, and specifically one of our friends. One of his best selling wares was the ancient nazi "defication" or stuff he sold. Most of us clean up the guns we're trying to sell. This guy would sell "stuff" (only because I can't use the terms to describe it here.) Then he'd make a pass over to the skinheads tables. He'd buy current or recent manufacture replacements. Knives, medallions, medals, or stuff the off balance crowd passes around. He'd just bag it up and take it home. His aging methodology included a couple of months in his back yard, on the picnic table. Rain was good, so was airborne dirt. The sun tended to bake it into the surface and cause just a bit of corrosion.
There is a buying group of people with more money than common sense. They took one look and were sure it was battlefield scavenged war trophies.
So go ahead and see what a night or two in some rain does. Then some hot sunlight. Maybe take it to the beach and practice stab some sand a few dozen times (it'll take away the shine.)
As repulsive as this next suggestion will be...You could clean the gear you wear, or even replace just enough of it so the knife doesn't look out of place.
Or at the next outing, take your new knife along and volunteer to help prepare food, using the knife at every opportunity so it reflects honest wear.
