Car wax is designed to fill in scratches, protect paint jobs, and leave a slick shine on metal finishes. Why limit its use to automobiles? Turns out that the substance is good for all types of things at home. Pick up a jar and start using it throughout the house. Here are ten ways you might not know about… You can buy car wax in either paste or liquid form. Applying the wax requires just elbow grease and a clean, dry cloth.