I'm using vinyl stickers for my Rubik's cubes and I'm looking for a tougher vinyl. In the attached image you can see that the 4 mil Oracal 6310 Fluro colors hold up relatively well but the 2.5 mil 631 does not. Which brands/series of vinyl should I try out? I need a decent variety of colors but it doesn't need to be as big as Oracal's.