Btw, anyone got tips on how to fix boxes? 
It depends on the type of damage(rip, tear, missing veneer etc), the type of cardboard (thermally bound, poly sealed, etc), the type of veneer/print surface, and the type of sealant used if any.
You have to determine if the veneer and finish are thermally based or if they are polymers (which won't be affected by heating) and determine is the Dyes (or inks) are water soluble or if they are oil based dies with water resistance. You have to determine the level of dimensional stability of the coating vs. the cardboard, or you will end up with an “orange peel” effect using thermally based repair methods. There are many methods to fix wrinkles, tears, or just about anything. I do not fix the artwork in most cases however. I have printed a small area and spliced it into a place with missing veneer though... a couple of times in extreme cases.
If the dyes/inks are not water resistant, then you can't use steam and dry heat might be required. If you can use steam, then that works sometimes as it is easier to control the temp of steam. Sometimes you can use dry heat from a heat gun or hair dryer if the cardboard is thermally bound/pressed and the veneer is thermally resistant (like a resin polymer) You can Google cardboard chemistry and print surface chemistry/characteristics, it isn’t as complex as it might sound from me trying to compress too many years of experiences into a few paragraphs. Hmm.
If the veneer is a coating that has stretched, you will have to repair the paper first... then shave off the hyper-extended coating which will be a tall wrinkle and then repair the color with dye or inks, then re-seal it with a compatible coating.
Ok... I am going to stop because I realize this is too complex to type out and it so very dependent on the type of damage and determining what materials you can use... to determine what kind of repair methods you can employ.
Hmm... I need to write a tutorial, but I realize it would take many many hours and much thought. I have repaired a lot of boxes... Maybe I can type up some guidelines with some structure to it in the next few months.
I have always focused on repair methods with a level of integrity that they can not be found... I hide a mark on the repairs I do that is nearly impossible to find. I always thought I could prove someone sold something I repair as I don't do it with intent to sell and or deceive.
MrBlackCat
