Just what I've been looking for, a way to keep my Felco tools in top shape. The rapidly biodegradable Felco spray uses a 100% synthetic-based nonstick formula that remains stable with age and oxidation, and will never become resinous. (I think that means that it never gets old and sticky). It has been specially developed for cleaning all mechanical parts of gardening and workshop tools. It protects all types of metals permanently against corrosion and provides an effective waterproof coating. It does not contain butane gas. With this and sharpening, the Felco's should last almost forever.