Joined: Jan 2009
Posts: 44,128
Likes: 6,348
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
I bent brake calipers daily when my hands were not as strong as they are now, and I used a 6" adjustable wrench. I promise you, this is not as big a deal as you seem to think. I suggest you take the wrench with you on a ride around your neighborhood. Bend, test ride, bend, rinse and repeat.
Add "Racer" brand brakes (not MAFAC Racer) to the list of unbendable calipers. I think they might have been made by CLB.