i had no choice =( it was flaking too severely, the owner asked more than 10 detailers all rejected his job, i treated as a challenge.
but 1000 - 1500 could not even sand at all! i trying to lower to 800 which i normally do not use, still doesnt do good, sanding about 15mins already wears off the sandpaper.
6 hours job and i was sweating like hell