I was asked to "fix this" blank ballons...when the sentiment was to be added...4 different markers failed. They didn't know about the coating on mylar baloons. The alcohol in the ink dissolves the coating and sticks to the tip....making a sharpie stop dead flow and the balloon to lift the coating down to the silver finish...in other words...a mess.
Since I knew about mylar's failure to play well with others...I knew to use a ceramic marker...permanent marker--water based. So I turned it from the first one with the many attempts...to the pics you see. I'm sure the recipient was well pleased.