replacing single rear brake caliper?

This may help:
http://www.tegger.com/hondafaq/rustybrakes/moredetail/brakes2_detail.html
(should be all on one line)

 

Yup, your excellent page is what I had in mind. It's the idea of going
up and down with that file for eons that makes me want to try a drill
attachment. I've seen very small wire brush attachments that might work
too, will have to look around. In the final analysis, I know I can use
the half-file by hand.

 

Break the rat-tail file in half and clamp that in the drill.

 

That's what I was planning to do, but it would be more efficient with
the type of file with its teeth designed for rotary use instead of
forward/back. I'm almost certain that I've seen such.