[lhnz]

Interesting that some of the stickers contain significant white elements. Is the material used less likely to mark?

Actually, I'm not sure that these are stickers. Maybe it's paint. If it's a sticker it'd be very difficult to apply this perfectly...

[Symbiote]

It's vinyl, the same material used to wrap a train or bus (or racing car) in a printed advert.

(Search "vinyl train wrap".)