Signwriters design, make, paint and install signs for a variety of commercial, industrial and practical purposes. They consult with their client about the type of sign they need, select the materials required, then plan and design the required piece. They may draw or paint signs, make three-dimensional lettering for signs, make screen printed signs, and bend glass to make illuminated signs. They cut board and metal to size, prepare the surfaces so that lettering and other designs can be applied, and clean the sign once it has been manufactured. They may also seal the finished sign with a spray or clear vinyl material.