I made an advertisement strip for a car's license plate frame just for fun. I designed it in Autodesk Inventor and 3D-printed it. I'm quite happy with how it looks. Here it is:

It is attached to the car using the standard method, which I don't know the name of but I'm going to call them “clips". I couldn't find any blueprint or any dimensions of these but I did find an image of a license plate frame and scaled the image to around real size so that I could see at least how high and wide the clips should be. I also used that image for determining where to place the clips.

It later turned out that I didn't scale the image correctly and the clips therefore ended up slightly too far away from each other. To fix the problem I simply cut off parts of the clips so that they would fit in the holes. Some of them broke when I did that but the problem was fixed easily with super glue.

The sign was too big to fit in the 3D-printer so I had to divide it into three parts. I assembled them by drilling two small holes on each side and then inserting glue and a short piece of steel wire. It became quite sturdy this way.

I then painted the sign. First I painted the letters and flowers white to hide the plastic texture. Then I painted the rest with a nice metallic green color that we happened to have at home.

And then it was done. It's not perfect because of the sloppy paint job and the visible cracks in between the pieces but I think it's still pretty good.