Post by 8aceFinally I have got the pictures of my attempt to blue the gold coloured marushin P08 Luger.
I used Birchwood Casey super blue liquid, some lint free cloth, cotton buds (Q tips for our American friends), and some scotch-brite type scouring pads.
1: Strip the gun completely (which I found quite easy) and this website has some useful info and drawings
http://www.lugerforum.com/ 2: With the wet scouring pads rub the gold coloured coating off all visible surfaces (I didn’t use wet & dry paper as I thought it would be to harsh)
3: Clean all of the parts with water/detergent and if possible use a solvent, which doesn’t leave a residue as the final cleaning stage.
4: Taking each component at a time apply the bluing liquid (with a cotton bud for small areas and a cloth for large areas) and rub it in to the metal until you get an even colour. Some surfaces will darken instantly but some will only darken after continual rubbing.
5: When you have the colour you like over the entire surface of the component leave it to soak in water for 1 minuet and wipe dry.
7: Wipe the blued surfaces with light oil (3 in 1)
8: Reassemble the gun.
9: Sit back with a beer and marvel at you handy work
As you can see from my photos the colour is not perfect and some of the gold colour is showing through which gives it a nice antique look but not a new blue steel look.
If I was to do it again I would take more time over the initial rubbing down which would help the bluing liquid take better.