Are there significant merits to staining and waterproofing all surfaces prior to final assembly? It would be more time efficient for my personal schedule to glue all the pieces over the next few nights and stain it over the upcoming nice weather weekend (have to stain/finish outside) - but if it would degrade the quality of the product I can exercise more patience... If I stain it first chances are I would nail more pieces together or use some tape to keep glue parts free of stain.
Some surfaces will not be reachable once assembled.
Some surfaces will not be reachable once assembled.