Alot of those questions depend on what you're customer has in mind for the use of the stickers. If you're thinking they want just normal stickers as give aways or promo items I'm sure that material would work. I personally use GMI 3 mil calendered vinyl. As for laminating it, again how are they going to be used. I don't laminate stickers unless I know it's going to be used in an environment that needs it. Remember, time and money. Does your customer really need that extra protection for the cost? Is it easier to just run them without it, make less overall money but spend less time doing the work?