The instructions you received are correct.
Pookie's website is also correct, in that, if you heat the metal to 1600 degrees and allow it to cool slowly, it will become "annealed". The problem here is that "annealed" (dead soft) is not what you're after. What you're wanting to do is to "harden" the steel around the holes so that the metal will wear better.
In order to harden steel, you first heat it, red-hot, and then rapidly quench it in oil or cold water. (I personally prefer water.) This leaves the metal in a state that is "file-hard", somewhere in the Rockwell hardness range of 60-70, depending on the type of steel. In this hardness range, the holes would wear forever, but the steel will also have become brittle (just like a file) and will be subject to break-out under impact loading. The steel around the holes has also much become much harder than the pins which are passing through them. This excessive "hardness" would cause the pins themselves to wear much quicker than they normaly should.
The process of removing this "excess" hardness is called "tempering" and it is intended to restore "flexability" to the metal while still leaving it in a semi-hardened state. Heating the metal around the holes, untill it turns a blueish/purple color, and then allowing it to slowly air cool will reduce the Rockwell hardness of the steel down into the 40-50 range (about the hardness of a good knife blade) and will greatly reduce the "brittleness" factor of the metal.
Polishing the metal around the holes, to a mirror finish, prior to the tempering stage, will allow you to more accurately see the delicate color changes in the steel.
HTH . . . . . Doug