Not having a credit card handy (meaning: I'd have to walk from where the thought struck me, approximately 30 feet into the house), I spotted a wall outlet cover in a misc hardware drawer that looked like a likely candidate for spreading glue on some 4" boards. Poured on the TBII and took a swipe with the cover across the board. Wow! Nice even coverage. gotta love the curved edge of those covers. Try it some time--it's not as weird as it sounds.
What "odd" thing have you spread glue with, that worked well?
Dave