Removing front calipers

[JassyTheDog]

I am trying to replace my front calipers and hoses, but having a real issue disconnecting the hoses as they seem to have rusted solid each end. I was not going to replace the hoses initially but in rounding off the nut in to one caliper trying to disconnect hose I will now replace. So how the heck do you unscrew the nuts. I am fearful of damaging the nut on the inside wheel arch end as that would mean a complete replacement of the copper piping.

Any advice appreciated.

Thank you