Im really writing this as an FYI, as I just did this myself. While the old contacts needed a sanding occasionally, the new contacts also need to be cleaned along with the batteries. For the past couple of days I have been noticing the performance drop on my rebuilt Reo's. So today at work I took and old rubber eraser and cleaned the new firing pins and also the spring. While I was at it I cleaned the batteries I had with me. Took a lot of build up off of both. This way there is no chance of removing the plating and you get a fairly thorough scrub that soap and water wont do. Now its just like I installed the contacts on the first day.
If this has been posted before, my fault. And if someone has a better way let me know.
If this has been posted before, my fault. And if someone has a better way let me know.