The HPC coating is great, durable, and looks ok once installed, but it was a drama to get them done.  Oil kept leaking out of them in the oven and took many goes for HP to get the oil burnt off.  The factory paint hides all the casting defects, which the HPC coating does not.  If I was to do it again, I would get them stripped, then spend a few hours sanding / polishing out the casting marks and corrosion as much as possible before getting them coated.  Reality is 90% of them are hidden under co