As you know, some labels are plain paper (many 2600) while others are 'plasti-coated' (most NES). The plain paper labels are easily ruined, while the coated labels can better prevent water & other types of damage. So here's the question:
If you could add a protective 'film' to the plain paper labels, would you do it?
Clear shelf (contact) paper is perfect for this. Simply peel & press to the label, then use an x-acto knife to trim the excess. If done right, the label is protected, has a nice shine, and seems factory-done. The problem: for better or worse, this is an alteration of the original cart. Once the clear film is added, it's permanent. There's no good way to return the cart to 'in the day' condition without ruining the label. I have no qualms about doing this procedure with homebrews and common carts, but what about rare carts? It's good protection, but an alteration that many may not even notice. What do you think?
Thanks,
Jeff D