i have used it also. the only place that it has worked to my satisfaction is the trim that surrounds my tonneau cover for my pickup. it had a lot of polish stain on it from using a pc without taping it off before any work was done. it was quite unsightly. i used it and it seems to be back to normal now.
i did have a problem with getting it on evenly but if you put on many coats as i did it will eventually look even throughout. i am satisfied with the product but have since learned technique's that keep the need for it at a minimum. if i do not create a problem i do not need to fix it....