He was more or less useful, even if he did gum up the plot there for a while.
After the etching has dried remove the same with water, and gum up again.
But if it ever came down to it I should be able to knock down an airplane, gum up the works on a fusing detonator, maybe even—.
That was why I objected to it in the first place: 'fraid somebody would lose it and gum up things.
In either case it is advisable to gum up the work with strong gum and allow it to stand until dry.
If you do not follow this advice the glue will gum up the tools and the sandpaper used to finish the work.
Explosions and accidents of many kinds are possible with the lamp that is allowed to clog and gum up.
Always wipe the stone dry after using, as the oil will dry and gum up the grinding surface if not kept clean.