For years I used my finger to spread glue beads on the edges of boards. Then, in sweaty haste, I'd wipe my fingers on my pants and another pair of nice jeans would become 'work-only' attire. To make the job less messy, all you need is an old credit card (or new, your choice), a 3/4-in.two-hole EMT conduit strap (about 50? at a home center) and two 1/8-in.nuts and bolts. Crook the conduit strap in a vise to level the conduit strap wings with the bottle cap. This way the credit card stays flat when you bolt it on. Drill a couple of window holes in the middle of the credit card so you can monitor the size of the glue bead, then drill bolt holes in the end of the card, snap the conduit strap onto the bottle cap and bolt on the card. Practice applying glue on a scrap board and in a few minutes you'll get it down (pun intended). Be sure to use fresh glue—the lightly bending card will spread it like butter. Want to get really good at edge-gluing boards? This video and these 10 tips teach you everything you need to know.