Contrary to what some reviews say, this works very well on weak stripes, by cons if you put another kind smartpen product before, it will be ineffective. So if you treated your stripes before, this will be ineffective, otherwise it is super effective if you have not dealt scratches. Obviously, we have to wash the striped part: glass cleaner, sponge and chamois suffisent..et do this in the shade and unheated body ... Make perpendicular movements, otherwise it is ineffective !!!
