You can have multiple mass markings, but if you have a bundle of mass masking from different files in your game, people won't see it if not see something different. Again if other people don't have the exact masking code in there's as well, they won't see you. You will look like a marshmallow to them really. Same with everything else really, items are like this too.
Unless other people has the exact same masking codes, people won't see your markings
