is this rear caliper salvageable?

[joebloggs]

[quote author=sinto link=topic=19013.msg220178#msg220178 date=1451407453]
[quote author=Bretty link=topic=19013.msg220177#msg220177 date=1451407175]
I have no idea how to get the pistons out now,

If you've got an air compressor, join your two bits of calipers together again and blow them out
Make sure they're connected or you'll do more than "blow the bloody doors off" :b
[/quote]

I have a blow gun that I have adapted with a Banjo bolt, so that the body of the gun screws into the caliper. Compressed air normally gets the pistons out. Also I find a bit of heat helps if they are being stubborn... The seals are fucked anyway so a blow torch wouldn't hurt anything so long as you don't go mental and melt the o-ring seal between parts of the caliper.
[/quote]

I've used a grease gun on the bleed nipple to ease them out in the past, OK so you need to give them a good clean after but I prefer the grease method as you not have pistons flying past your ears when they finally pop free