What do you need to draw small details on the graffiti wall? Do I have to use that acrylic pen? But I think everything sold online is used for drawing?
There are generally two kinds of paintings on the wall, one is chalk or oil painting pen, which is used the most. Generally, these two brushes are used in small areas. The other is the spray gun, and those small spray guns can also draw the details of the wall painting. If you haven't used a spray gun, it is recommended to draw those details directly with gouache.