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Only reason I plated the wheel hubs and drum was I did not want to paint the interior bits and this will prevent corrosion plus I had to fill a pail of parts to make an order with the plating shop so I figured why not. I plated most of the steering parts as well, they don’t get painted either hidden in the frame stem, overkill I know but it probably didn’t cost me anything.
I don't know what type of welding you have but I did some googling and learned about a few choices. I mostly use TIG and there is a rod called Weld Mold 958 which impressed me. Looks like your usual copper coated all purpose steel rod but it produces a hard face weld without any further hardening. The video I saw showed a guy laying a bead at the end of a mild steel bar and sharpening it into a chisel and putting it through it's paces with excellent results. Looked like normal tig welding but would be perfect for what u have there. If you don't tig maybe call around to local shops and see if they have this rod. Shouldn't be much to build it up and u could shape it as required with a variety of die grinder/cut off wheels/mini belt sander type tools. Easier than regular weld and then trying to harden it or worrying it won't last. There were also stick welding rods and mig wire and hardening powders but I liked the tig method best. seemed like all the other ones were laying beads in big loader buckets to slow down wear.
Good info on the powder primer; never heard of it before.