Thanks guys, just cleaned the epoxy drops from the gap with a hobby knife, no its not easy.
i see there is epoxy residue on both parts which means its gonna be old epoxy to old epoxy bond not wood to epoxy...
i'm lucky there is a ply wood wing tip to hold it.

i'll cut off the excess sheeting in few hours to get a clean place for sanding and will glue it again.

Thanks again
Alex