We are trying to get into letter board assembly and simply put we are struggling to figure out how to do this. The one job we have right now is the tracks on ACM. The tracks are the Gemini Tracks from Grimco which recommend using WELD-ON 3 or 4. This is where the struggle is because no matter how I coat the panel and the tracks with the WELD-ON 3 they just pop off when I test them after curing. My thought is there is something I am missing because outside of just riveting it together which is something we want to avoid with this particular job due to the client wanting a "Clean" look I am kind of at a loss at what I am doing wrong. Any and all advice would is appreciated.