I believe the less glossy side is meant to be the front. I got samples of M1300 and M2500 from Draper, and there were labels on the front sides. The M1300 label was on the more "matte" side (less glossy...) side. The glossy side will probably hot-spot. I also have a similar PVC material from Dazian, which definately hotspots on the shiny side.
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