I’m in the process of finishing a side table of alder.  I finished the final sanding and applied a coat of wood conditioner before the stain.  The piece looked perfect after the conditioner dried.  I applied the stain and low and behold a couple of spots of glue showed up in the bottom shelf which obviously did not take the stain.  Will I have to completely sand out the entire shelf and start over or can the shelf be salvaged in some way?  If I just sand out the glue spots, which are very small, and restain those areas will I be ok.  Anyone with any experience doing this?  Thanks in advance.