If you found spraypaint and a wooden mallet in a garbage bag?

If you are trying to become a comedy writer you are well on your way but to answer your question, if they had found the Mallet and spray paint they would probably have questioned you more but since neither are illegal there would not have been anything to arrest you for, However if you had a knife then you could have been arrested for possession of a deadly weapon during the commission of a crime, Hitting the vehicles.}{