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This article is from the Woodworking FAQ
Collection 1, by multiple authors.
43 Ammonia Fuming: Is it best to fume the piece before or after finalassembly (gluing, sanding, etc.)?
My practice has been to assemble & glue all joints and to do final
finish-sanding before the piece is fumed. Significant grain-raising does
not appear to occur as a result of fuming, although keep in mind that the
fuming chamber is a high-humidity environment.
Drawers should be pulled completely out, and tabletops can (should?) be
detached to promote complete coverage. Make certain all areas to be colored
are fully exposed; the undersides of boards will be fumed OK as long as
they are not in contact with the floor or other objects. As with staining,
glue residues need to be carefully removed beforehand, but it seems that
the effect of glue residue is not quite so severe as with staining
(probably glue residue has little effect on ammonia penetration/reaction,
but prevents the final clear finish from reaching the wood and producing
full depth of color.) Some people prefer to fume all pieces before
assembly/gluing. As far as I know, if fuming is done first, it will not
interfere with gluing later on.
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crafts, woodworking, bandsaw, biscuit joiners, dust collect, jointer, miter saw, motors, planer, router, sander, shop heat, toy safety, ammonia, antique tool, hide glue, motors, wood bending, workbench
