What are the primary differences between a mechanic's lien and an artisan's lien? When may a person use each?

• What are the primary differences between a mechanic’s lien and an artisan’s lien?  When may a person use each? 
• Do you think allowing individuals/businesses to recover payment for servicesviathe lien process is efficient?  Is it fair? 
• What if someone attempts to exercise a lien wrongfully, and there is a dispute on whether any payment is due?  What remedies does the person whose property has been wrongfully possessed have?

LiensThe main difference between artisan and mechanical lien is that:Artisan liens is against personal property and its possessory while mechanic liens deals with realpropertyArtisan lien is...