Oh Matthew!! If only it were that simple
Artwork will be key, there is plenty of sh*t artwork out there, also, most stickers should really be printed, gassed and then have a clear laminate applied, otherwise they won't really last a long time.
The difficulty is the technology that sticker makers now use. I can produce excellent quality printed stickers, but most standard printers like myself can't print chrome / metallic or do embossing, without the special kit.
These should be fun for hobbyist messing about, but perhaps double-layer them if you can.