How can I conceal a separation between the boards of a dry sink?

Gloria tulip
by Gloria tulip

I have already painted the sink so need some attractive way to hide the separation. I tried glue and I was not satisfied. I could not find an appropriate trim to use. Thought about using old yard sticks (I would paint). The separations are not located symmetrically; that is, on one side the crack is about 3 inches from the front and on the other side about 6 inches from the front.

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