Can you use a shoe for rigid metal conduit to bend a PVC-coated conduit of same size?
There are shoes made specifically for PVC-coated conduit which will accommodate for the exterior coating and bend the elbow properly. Using a shoe made for RMC will cause the coating to be pinched. Using a shoe for the next trade size up will collapse the elbow. Shoes made specifically for PVC-coated conduit can be purchased from the hydraulic bender manufacturer.