To melt the slide, you grind off the edges and angles. This makes it look like a bar of used soap so the edges don't hurt you when carrying close to your body.
Heres' a pic of the P3AT before melting the slide...
You can see the sharp edge on the top part of the slide...
After you grind it down ( you can use a file, dremmel or other methods), You finish it in whatever method you choose.
I initially used cold blueing, but didn't get the results I was looking for, so I searched until I found Cera Coat. I liked the way it looked, the hardness of it and moisture resistence.
I ordered the finish from Sportsmans warehouse (the cheapest place I could find it) and followed the directions.
Basically, be sure there is no rust or oil on the metal parts you intend to finish. Spray a coat on and let it set for 30 minutes. After that you can apply an additional coat and let it dry for 30 minutes as well. If you really want a tough finish, you can apply a 3rd coat (which I did) and let it dry for 30 minutes. After that, you preheat the oven to 350. Insert the metal coated parts and bake for 1 hour. It's very important the heat is maintained at 350 and that it stays in for exactly an hour, or your finish may look a bit red...
Hope I answered your question...
God Bless,
Doc S