It would help if you included the URL.
I assume you're talking about these guys:
https://www.chaptercustomizer.com
I'd be hesitant. They mention 25 micron 3d printing which is I think about the best you can get out of a consumer grade printer nowadays, but it'll look like this:
Maybe they have some trick to eliminate the stair-stepping evident on the curved spots, and maybe it wouldn't even be that bad once painted, but I think it'd really stick out on something curved like shoulderpads, Particularly if you tried to apply a wash or ink. I'm not too hopeful though, as they don't have any pictures of their stuff; 3d renders don't instill in my a whole lot of confidence.
If you do go for it, be sure to let us know how it turns out though.