Abstract: In order to be able to easily and sufficiently remove paint from the surface of a bumper, grooves or projections are provided on the surface of one roller, from among a pair of rollers on a roller apparatus (1), that comes into contact with the surface of the paint, and the paint is divided by making cuts in the paint by means of the grooves, or the like. In addition, by making the rotation speed of one roller faster than the other roller, the abovementioned cuts are widened further and the paint is divided into a plurality of narrow, strip-shaped pieces. When a sandblasting apparatus (2) sandblasts towards the strips of paint, and the like, from a diagonal direction, the sandblast strikes not only the surface of the paint but the edges of the cuts as well, whereby the paint can be efficiently removed.

Abstract: An attaching part of a reflecting mirror is fixed to a guardrail of a road. A solar cell device of a solar-powered light emitter accumulates electricity produce by sunlight of the daytime, and a light emitting diode emits light at nighttime. When a front panel is irradiated with light from a headlight of an automobile running at nighttime, the light is reflected off a diamond cut of a rear surface, in particular, then the light is reflected off the surface of an inner panel on which reflecting surface work is made, and the reflected light is irregularly reflected by the diamond cut surface, thereby functioning as a driving sign in combination with the emitted light from the light emitting diode. Dirt adhered to the front surface of the front panel peels off because of a self purification effect of titanium oxide on the front surface.

Abstract: An attaching part of a reflecting mirror is fixed to a guardrail of a road. A solar of a solar-powered light emitter accumulates electricity by sunlight of the daytime, and the light emitting diode emits light at nighttime. Therefore, when the front panel is irradiated with headlight of an automobile running at nighttime, the light is reflected off the diamond cut of the rear surface, in particular, then the light is reflected off the surface of the inner panel on which reflecting surface work is made, and the reflected light is irregularly reflected by the diamond cut surface of the rear surface of the front panel, thereby functioning as a driving sign of the running automobile in combination with the emitted light from the light emitting diode. Furthermore, the dirt adhered to the front surface of the front panel is automatically peeled off because of the self purification effect of titanium oxide with which the front surface is coated.