I can't find the HX/HX black paint spec, but HQ Sandman uses Black 578-4149 for the stripes. This is a medium gloss black also used on HQ, HJ and LH interior like steering column etc (the 578 tells you medium gloss). I have a sheet that shows this also being used for LH interior bits but also shows LX using 578-11488 for the same bits, BUT it calls it LOW gloss, not medium gloss for LX..Go figure. I have it in the text for my book that HX and HZ use Tuxedo black but i'm not sure where I got that from or if it is correct. HZ features manual says: "Rocker panel, side glass frames, frame openings, rear quarter panels, windscreen frame, door handles and tail gate window surround feature low gloss black paintouts". At this stage my guess is 578-11488, until I find more data.