I had a pair of 65 Pontiac bucket seats for my truck back in 1977. One was white one was black. I painted the white one black and mind you did a horrible job of prepping as I didn't have a clue back then. It lasted many years with only a few tiny scratches where my comb in my back pocket hit it.
I have found it to be great stuff and cover well. My recent use was black over black but using all the SEM products following the tech sheet they provide I feel it is as good as I can get. They make great products.