From EMDKAY's site
Q: How exactly do I mount the marquee onto my arcade cabinet?
A: There are several different methods to mount your marquee. You can sandwich the marquee between two sheets of lexan, then place screws directly through the lexan and marquee into the cabinet marquee frame. You could also use a marquee retainer (see below), but it is not necessary. A marquee retainer simply supplies a frame for the lexan that mounts around the cabinet marquee frame. The good thing about using a marquee retainer is that you don't have to drill holes through the lexan and marquee.
Also, if you don't have lexan or special tools, you could simply place screws directly through the marquee, into the marquee frame. Some people choose to simply use a sticky adhesive around the back of the marquee, and mount it to the marquee frame area on the arcade cabinet. Please view the "customer installations" page to see how they look when mounted with these different methods.
An economical and non-technical way of securely sandwiching your marquee between two sheets of lexan is to use small binder clips - available at most office supply stores.
There are no "wrong" ways to mount your marquee. These are just the most common methods that customers choose to follow. It never hurts to get creative when mounting a marquee. One customer used car window weather stripping as a marquee retainer! Hey, whatever works!
Q: I want to use marquee retainers. How can I ensure that they do not cover up my marquee artwork?
A: If the very top or very bottom of your image contains a part of the image that you do not want to be covered by marquee retainers, you can specify two sets of dimensions when ordering:
Material dimensions (actual size of the marquee material)
Viewable dimensions (smaller dimensions, after the marquee retainers are applied).
Q: I'd like to use a Happ's Marquee Retainer to hold my marquee in place, but I'm not sure how to install the product. How is this done?
A: Happ's Marquee Retainers are very popular for mounting our marquees. Please view this image for instructions on installing the marquee retainers.
Personally I use either the L shaped aluminum strips that go around the outside of the perimeter to hang suspended ceilings. They are about 3/4 by 3/4. I have had to use a smaller strip on a bartop cab lately so I switched to the plastic corner molding used to protect paint and plaster in homes. It is about 1/2 by 1/2 or a bit smaller and has tape or can be held in place with small screws. Either product can be painted any color that you want.
http://forum.arcadecontrols.com/index.php?topic=9978.0