resin is a super glue job.... plastic glue doesn't hold.
clean the gunk off the resin first, it's the bits of the mould the failed to wash off... and let the model dry. Clean it up and super glue together. You might want to fill the holes between the pieces with super fine milliput or something similar ( green stuff).
painting is the same as plastic.... spray, spray again, then paint as normal
currently i'm converting a falcon for the same purposes....
currently it's a mass of sharp things, guns and other choice bits... I also got some plastic a made some large wings/gun mounts.