I don't know how to get rid of blemishes except that to get rid of any blemish means removing steel. And removing steel, by definition, alters the contour too. In the days of No5's,7's, 9's and L1 bayonets we always had some rusty scabby old bayonets and even rustier scabby old scabbards too. If that was the case, they went through the bead blasting and phosphating finish, same as anything else. The rust and pit MARKS remained but the bayonets were perfectly serviceable, ready to last another 30 years. Under the grips, some of them were absolutely minging. (that's another REME technical phrase all budding Armourers soon learned. As in 'what the xxxx do you call that...... it's xxxxing minging'). That how it was done in real life where appearance didn't count so much as serviceability.

That's how we did it, same as we do today except that the current bayonets don't seem to rust like the L1 types. The tips don't even break off now do they Skippy?