KLJ
Member
After reading the article in the library on using black it, I remembered I had some very out of date gun blueing. I wiped a tube with denatured alcohol put tube in the gun blueing ( less than a minute) and it seemed to work well. What I used was very old birchwood casey super blue, fresh would probably work better, have not used on a pen so don't know how glue effects it, just giving you something to try that looks like might work well.