My Terra radio installation instruction says "Porper attachment of any
antenna to the aircraft surface is of primary importance. Carefull
clean all paint and corrosion off the mounting surface and apply an
anti-corrosion treatment."

Question 1, does "clean all paint" mean strip all paint to bare
aluminum?

Question 2, what type of "anti-corrosion treatment" should I use?

Thanks in advance,

Robin Hou