For the bottle cage bolt, this thread has a few ideas.
As for the brake nut, what do you mean you're bending the wrench? As in you're actually bending the allen key permanently? That's usually fairly hard to do without rounding out the bolt...
If you have a ratchet (as in for a socket set), try buying an allen driver of the relevant size that fits it, and using the ratchet to get the brake nut off once you've let the Liquid Wrench soak in. I very much doubt you'll bend the ratchet handle.