Returned to work on restriction 0 use of arm not getting 40 hours of work due lack of work refuses to make up diff of aww

that's a tough question to answer.  These are always very fact-specific situations whether the reduced hours are the result of the injury or true business lack of work issues.  I agree that your first best course of action is to seek a partial benefit rate under workers comp.  I'm doubtful you can get unemploymnet because you are working some hours.  But if you can do some type of gainful employment (of any kind) that would make you eligible for unemployment comp.