Typical glue brushes are too soft for spreading glue onto the walls of mortises, and they can be hard to squeeze into tight spaces. Scrap wood applicators work better, and here’s where you can get them for free. The next time you buy a hot beverage, save the wooden stir stick for glue-ups instead of immediately throwing it away. Wash it clean, and keep it with your glue supplies. It’ll reach into corners where a brush won’t.
– Charles Mak