Yellow Sponge Paint Roller with tray Instructions for roller brush: Before use, immerse the roller brush in water, fully soak and dry the excess water. Dip an appropriate amount of paint with a roller brush and roll it in the supporting tray. The concave convex lines on the surface of the tray can reduce paint waste and splash. Then roll the roller brush on the surface of the object to be brushed along the up and down direction, rear cross direction and up and down direction, so as to make the coating distribution more uniform. Please clean the roller brush and supporting tools with clean water immediately after use. Dry excess water naturally. When the roller brush is wet, it should be hung rather than placed horizontally, because the wet fluff cannot be restored to its original state after being squeezed.