Am I (legally) allowed to paint copyrighted material inside and/or out?
This is a valid question. My hat's off to Slick, for zeroing in on the legalities of copywritten property. Regardless of what the logo, image or artistic medium consists of, it's important to recognize the big picture here. I admit that I thought he was yanking us around, but the laws pertaining to the infringement of others "art work" have recently been reinforced and action taken to recover punitive damages. Although each state has it's own interpretation of the laws and guidelines, it would be prudent to alter the "allowable" percent of the design that your state permits, in order to circumvent any wrongful harm.
Most of us have heard about the occasional songwriter, who sues a big name singer or band for playing his/her original version without permission.
Frankly, I am in the camp that says go ahead and paint your cabinets any way you choose. But be prepared for a phone call or letter in the mail about removing any similar designs outside of your home.
If you really like the idea of sporting the logo, why not contact the company and ask if they will sponsor($) you to display it on your roof.
There are plenty of companies that will also pay you to drive your new or relatively new car around with a full size ad painted all over it!