How can I effectively stain over wood glue for a seamless finish?

To effectively stain over wood glue for a seamless finish, first ensure the glue is completely dry and sanded smooth. Apply a pre-stain wood conditioner to help the stain absorb evenly. Then, apply the stain in thin, even coats, allowing each coat to dry before applying the next. Finish with a clear topcoat for added protection and a smooth finish.