Period correct wiper arms?

Get a curved pry bar(small),a rag and small(thin)piece of wood. Put the rag dow first. Next the piece of wood. Take the pry bar pry up on the arm against the wood. Cover a big portion of the hood cause it may pop off unexpectantly or have someone hold the arm while you pry or both. Should pop off fairly easy without toomuch muscle. I know I'm a hillbilly but, it works