The inside corners of a small wooden box are easier to finish while the parts are still flat on the bench. The catch is the joint: ordinary woodworking glue generally needs clean, bare wood, not a layer of oil, wax or varnish between the mating faces. Plan that boundary before opening the finish.
Dry-fit the box and lightly mark where each part meets its neighbour. Include the ends of rails, the shoulders of joints and any groove that will actually be glued. Do not assume every groove needs adhesive; a floating solid-wood panel may need room to move. Follow the design rather than turning every contact point into a glue joint.
Separate the parts and mask the intended glue surfaces with tape suited to the wood and finish. Press the edges down without stretching the tape, and test it on an offcut first. Tape is a helpful boundary, not a waterproof seal: avoid flooding finish against its edge, particularly with a thin, penetrating product.
Apply the finish to the exposed areas as directed by its maker. Remove the masking within the tape maker’s recommended window and check for seepage or adhesive residue. Let the finish cure sufficiently for handling and clamping; dry to the touch is not always ready for pressure. Follow the product’s ventilation and rag-disposal instructions too.
Before glue-up, inspect both mating surfaces in good light and repeat the dry fit. If finish has reached a glue area, pause rather than hoping extra glue will compensate. Restore clean wood without changing the joint fit, or seek the adhesive maker’s guidance if penetration makes that uncertain. A bonding trial on matching finished scraps is useful, but it does not establish a safe load rating.
Practical takeaway: mark the joints, protect the bare wood and finish only the surfaces that need it. Do a final dry fit after the finish has cured. A few minutes of planning can spare you awkward brushwork without sacrificing the glue’s contact with the wood.
Wood GlueBox MakingFinishing