You can, of course, brush them, however this will not last long. More radical means of plastic washer embedded between the half-loops.
There is another way to get rid of the squeak. You need to shorten rod one half loop and put the loop inside a steel bearing ball.
Recommend to read
ELECTROBRUSH
Rust metal, faded over time, brickwork, lost look painted surface... In all these cases is taken sandpaper or a metal brush — and stop! In the direction — is the last day! The lion's...
TACTICAL SIXTIETH
(Model-a copy of the R-17). In October 1950, S. P. Korolev, the former at that time Chief designer of the Department of NII-88, involved in the ballistic long-range missiles, appealed to...
