I would be careful running unknown items through a laser printer. Way too easy to melt it and destroy the printer. You can get outdoor rated laser labels, but they are ultra-thin polyester sheets which are normally strong but tear very easily if they get any kind of slit in them. I have not tested these for long term heavy elements use since I don't have a color laser printer and most copy shops will not run your own stock through their copiers.
If you have an Epson pigment printer, you could use Sihl 3988 with an overlaminate, such as Oraguard 210. Some people think this is too costly compared to unlaminated solvent printing. Other people have told me that you should overlaminate outdoor solvent prints anyway, especially in high abuse areas like moving vehicles. So far so good for the lawn truck decals I made as a test run 2 months ago. One is on the front of the equipment trailer so it does get some abuse from direct impact debris. I'm not expecting that one to survive a year but I don't think any product would.
I'm not concerned about fading, I've been making window signs for work with Epson aftermarket pigments and non-UV protective regular hot lamination pouches for 6 years and they've all held up fine.
