Kelsey Hayes 4 piston calipers help

Whats the best way to remove stuck pistons from these calipers
Thanks

Use a grease gun and adapt it direct to the caliper is what another member suggested that rebuilds these all the time. In my way of thinking I buy a new Raybestos Proffessional Grade caliper from Rock Auto since they can be bought for under $52.00 plus shipping and return core shipping. With the $13.00 per side for the rubber kit and the $12.54 per piston I may end up spending more money doing it myself.