The entire surface of a Rose Parade float MUST be covered in natural materials such as seeds, beans, grains, fruits, vegetables, tree bark, leaves, dried flowers, fresh flowers, etc... The surfaces that appear to be "painted" are actually coated with an underlayer of white glue upon which is manually dabbed powdered floral material which is prepared by grinding seeds and flower petals into a fine dust. Many different floral materials are required to achieve the range of colors.