Following the Krylon-spray-paint-can & guns thread, I discovered the existence of a package-related product I hadn’t known about: the original “can-gun.” A ergonomic trigger attachment designed to make spray painting less taxing for the index finger.
Originally invented by Paul Hutchinson & Alan Serginson and assigned to Can-Gun Limited. Licensed to various companies, including Krylon. Generally comes packaged on a hook-rack card. Also comes in black.
(See 1st page of patent, after the fold…)