... coated finish prevents chipping, peeling, rust and corrosion. 3.System locks down and squares up frame ,tensioning for solid cover ... coated finish prevents chipping, peeling, rust and corrosion. 3.System locks down and squares up frame. tensioning for solid cover ... coated finish prevents chipping, peeling, rust and corrosion. 3.System locks down and squares up frame. tensioning for solid cover ...