Artist Muhammad Suhaimi Ali said he and his friends were undeterred after vandals defaced their highly-regarded murals of the Yang di-Pertuan Agong Sultan Abdullah Sultan Ahmad Shah and other leaders in Shah Alam with profanity.

Instead, the 27-year-old artist, also known as Miey Ali, said the act only served to spur their artistic spirit. If given the chance, they intend to return with even larger murals...