Rear Brake pads
Have replaced and overhauled disc brakes on several cars and bikes and not come across wind back calipers. If calipers have been sticky, I have used copper grease and pushed in the calipers (slowly and gently) using a big G clamp.
One of my Picanto's rear discs is squeeking and I was going to remove caliper (pushing in piston as require using my trusty G clamp), copper grease piston and replace.
Is this procedure going to damage the brake caliper? The wind back tools come in various designs and do not look any more technical than my G clamp.