A paintbrush stands for the urge to change how something looks or feels, one stroke at a time. Tradition also links it to creative work waiting for your own hand.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.