im not sure on copyright stuff, say like fanart of a known character, say Megaman. would that be allowed if one of my friends could draw it for me?
First, let me state that
I am not a lawyer, so don't take this as legal advice!When it comes to this kind of thing, erring on the side of caution is usually the smartest path. In other words, if it clearly had the word "Megaman" on it, or had the same features as the original, I'd say no. That character is a trademark that belongs to someone, just as the white swash on a red background belongs to and is trademarked by Coca-Cola.
On the other hand, if it was an original character
inspired by that character it's quite a different story. In other words, if you draw an Ape of your own creation, holding a damsel of your own creation, staring at a short guy with a bushy moustache of your own creation, I believe most would consider this an inspired but original work, so long as you don't put a big "DK" or "M" on there. After all, the giant ape/damsel in distress concept was inspired by King Kong and possibly Mighty Joe Young originally, so.....
Another example: If you had an a mountainous landscape with a ship flying over and people being abducted by alien craft, all of your original work, this would perhaps be inspired by Defender (or a myriad of other similar titles). Unless you put a big "Defender" on the side of the craft or used specific imagery from that game, you probably won't be stepping on the toes of others.
Is it a rabbit or is it Bugs Bunny? Rabbits are ok, Bugs Bunny is not (at least in this sense...otherwise Bugs Bunny is a riot

.)
Is this backlit film that you are printing on or is it a paper product, and which is more desireable, purely on quality, price not being a factor?
It is considered a film in the traditional sense of the word.
Paper is undesireable for backlit applications due to the density and orientation of the fibers passing the light unevenly through the material. This will cause odd shadows and muddling of colors. Paper, if not properly laminated, will also absorb moisture and tend to buckle in humid environments.
Backlit "films" come in many different formulations, none of which have the problems associated with paper. Some are formulated for high light output, but do so at the expense of contrast or black levels. Some are designed for reverse-printing, or "view-through" while others are meant to be encapsulated. Some are even clear and meant to be used with an external diffuser panel!
As with everything, the application and desired result is what dictates the proper selection of materials.
Pardon the potentially dumb question, but what do you mean by "simply taped to a single piece facing outward"? You mean tape the marquee BEHIND a single sheet of plexi, right?
That is correct. If your marquee is going into a frame or the edges are covered, you can cut it about 3/8" shorter than the plastic on each side and use a black vinyl tape to adhere it. Just make sure that you take it all the way to the edges and that it is applied in a nice straight line. The important thing is to keep stray light light from getting past the image, which is why black tape is preferred.
Out of curiosity, for sandwiching the printed marqee between 2 plexi's, should the "behind" piece be white to diffuse the light some, or is 2 clear pieces sufficient?
You can use a white diffuser if you'd like, but it is not necessary for this material. In fact, no backer is necessary if the above method of mounting is used.
RandyT