Best way to seam a sign

I am doing a 4'x20 ' sign face and need to know the best way to seam it as to hide the connecting point. I'm thinking of using dura bond. Any better suggestions would be greatly appreciated.


Map Wraster
What material sign face?
If it's polymetal, the most important part is a good straight cut & that your mounting brackets/studs hit at the edges of the verticals.