We cleaned everything in ultrasonic, then I bead blasted everything. The metal needs to be 100% clean. The brass (aluminum) is not affected by the parkerizing solutions so you can leave the plug in place. I don't think most of the kits come with replacements for those plugs in particular so unless you are sure, I say leave them. It is a cool process - you are going to love it.
Patrick Tipton
Branchville, NJ, United States
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07 Aug 09:13
You are so welcome Andrew. We all get so much satisfaction "reinventing" the wheel... seems like so many of the tips and tricks of working on these old machines are getting lost as the guys who grew up with them pass away. The manuals are mostly great, but you sure learn a lot in the field, working and testing. Enjoy!