"shed off" is a valid phrase in English. You can use it to mean "to come off freely or quickly" as in "The old paint from the door easily shed off with the help of a scraper".

Definition of to shed something off To shed means “to lose.” So “to shed something off“ could be used in the context of shedding off a jacket as soon as you get home because you no longer need to wear it inside. Could be to “shed a few pounds” or “to lose weight.” Or could be a natural process, such as, a snake “shedding” its skin.

To rid oneself of (something not wanted or needed): I shed 25 pounds as a result of my new diet. c. To take off (an article of clothing).

shed verb (FALL OFF) [ I/T ] to lose hair, leaves, or skin, or to cause hair, skin, or leaves to drop: [ I ] My cat shed all over the couch. [ T ] By November, the trees had shed their leaves.

a. To have (a growth or covering) be disconnected or fall off by a natural process: a tree shedding its leaves; a snake shedding its skin; a dog shedding its hair.