Hi folks,
I’m getting close to the glue-up stage for a panel and frame bookcase I’ve been hacking away at. This is my first “real” project. It seems that most folks begin the finish process after a given project is assembled. Is there a compelling reason(s) why one wouldn’t apply the finish before glue-up?
Yes, I’m new to this.
Cheers,
Doug
Replies
It is a good idea to finish (or at least stain) the panel prior to glue up. That prevents "white lines" when the panel shrinks in drier conditions.
The rails and stiles are another matter. It is all too likely that the surface may need small adjustments to bring both pieces absolutely flush to each other. The glue up may be slightly different from the dry fit. That can't be done if they have been pre-finished. There is also the matter that all surfaces to be glued must be protected from the finish--by no means impossible or even that difficult, but just another complication.
Like Steve said, a panel in a frame may shrink and expose unfinished edges. There are also cases when you just can't get inside to finish later. I built this plate rack cabinet last week and finished the inside before assembly. There wasn't any way to get in there afterwards. You have to be very careful with finished materials so you don't ding or scratch anything. You also have to make sure the build up of finish doesn't prevent parts from fitting or glue from sticking. Doing things like cabinet backs before assembly is much easier. It can be an advantage to be able to leave parts laying flat. You do have to watch the next steps in the finishing process. Pre-staining some pieces can be a big advantage. You just don't want to do any pieces that may need sanding or fitting after assembly. Doing the top coats over all the joinery helps seal it up and makes for a better appearance. Stains can often wick on end grain and can cause a displeasing look where pieces fit together. This isn't an issue if you stain after assembly.
Beat it to fit / Paint it to match
Thanks for the insights gents.
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