This may sound really crazy, but for the last 2 years, we dismantled our GBC and manually size and place our 3M or vinyl with no more than 2 inches of laminate on each side. For the additional labor and time it takes to do this, we have experienced an almost 100% success ratio for laminating with zero bubbles, wrinkles or mistakes. We don't use any butcher paper or wax paper- we simply size the laminate, aim the vinyl (as close as possible) and press "start" (usually at a 1 or 2 setting.) Once the GBC takes, we increase the setting to 7 or 8 and it rips right through.
For car wraps or delicate media, we are careful to make sure we have an extremely clean environment and almost never have any problems.
The only (rare) times we have mistakes is if we're under a deadline and hurrying. Haste makes waste. It really does.
Aloha,
Edserv