I've opened 'em numerous times by heating the bend with a torch but you have to be very careful not to heat the spring. As said, if you don't have to I wouldn't. Heating them and unbending a 90 deg. then heating again and closing it back up makes the clamps brittle and I've seen more than one break when closing them back up.
I'd just wire wheel 'em as best you can and give them the spray bomb treatment. Even if you take them apart the paint will wear off them where they rub anyway the first time you drive it so it's more of an exercise in futility than anything. Even a few mud baths and pressure washes will quickly reverse all your efforts so just go with the KISS approach.
'84 CJ-7: Yota axles (spartan locked front, e-locked rear) 4" BDS, 1" Daystar & 3/8" shackle lifts, 35" X-Terrains on steelies, YJ Tub & family roll bar, heater blower upgrade, 4.2L w/MC2100 & Team Rush, Warn 8274. Rebuilt 4.2/4.0 hybrid, AX15 and twin sticks/clocking ring waiting to go in.
The advertised position for a topless, dirty jeep girl has been filled......by my wife. Thanks to all that applied.
<------------and yes, that is her. :-D