Paint trays and buckets hold large quantities of paint for application. They are wide enough to fit rollers and large brushes and are also used to mix several colors of the same type of paint to create custom colors. Paint grids scrape excess paint off roller covers after they are dipped into paint. They fit over cans, pails, buckets, or trays. Paint strainers remove solids from paint to ensure a smooth finish is applied to substrates.