Brakes binding

[skyehelmsman]

My 61 Giulietta brakes are binding.
Lock up at rear sometimes,wont budge until i take off wheel adjuster  aturn:then ok for qa while ,minutes/hours.
Been to well known specialist in norther suburbs 3 times to no avail:ok when left shop,but by time im home they are binding again.
Wheel cylinders?

Brakes were totally overhauled when car restored,but that was 25 years ago,so maybe time for total brake refurb again.
Hand brake?
Return spring?

Advice and recommendations of brake specialt you can trust