I have cleaned and shined several older oxidized yagis by first spraying the
parts with an acidic mag wheel cleaner from the local auto parts store. I
allow it to foam for a couple of
minutes, and then rinse thoroughly with a water hose. This removes all the old
oxidation, dirt, etc. I stole the idea from an HVAC service man who used a
weak solution of HCL
and water to clean AC coils.
I then use 0000 steel wool to shine/buff the aluminum tubing.
It is a pretty quick process that has worked well for me. I have experienced
no pitting or aluminum degradation
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