First of all... I don't own this game.. but I like it. Why did I break into this club? No idea, I be in and out.... If you are satisfied how your inserts look when the machine is off. Then just lift your playfield, remove all the lights and hardware behind the insets that are being illuminated. Then paint "aka blackout" all the areas you don't want light to pass. You may need several layers or use very opaque black paint. After you do this, you must make these inserts LED. Buy "RETRO LED". If you paint behind an insert you can not have a standard bulb produce heat. LED = no heat... RETRO = Diner.

Last note: Shine a bright light on the playfield while you black out the other side. This way you will be able to see what you need to do. Take your time, use clean edges and keep adding layers till its amazing.

Or leave them alone yes. But, all he is trying to do is black out unwanted light. However, after looking at your inserts closer. I do agree this method will not work well. I did not notice you are missing a lot of ink. In this case your "blackout" will be seen from the other side. So, insert decals or just leave it alone. Sorry for the false advise I should have looked at the edges of your inserts closer before commenting.

yes, that will do the trick. However, you cant just stick the decals on. You have to strip down the insert first. I am sure people have just stuck them on, but you really want them inserts cleaned up. Since I already gave bad advice about the blackout method maybe someone else can confirm that the inserts need to be cleaned out before you add decals.