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Any thoughts on how to clean these up as well?
I use phosphoric acid, 85% concentrated. Remove all grease and dirt, then soak them in the acid for an hour or until all rust is gone. Rinse with water. They turn grey and afterward the head can be painted with 99% Zink, or Hammerite. Threads get Copper grease before installing.
But you can also get new chrome plated bolts in i.e. Biltema. Also locking bolts with key.
They do start rusting pretty quick, though.
