Rotary valve instruments will lubricate both the inner and outer valve bearings. For piston valves, coat both the valves and valve casing before reassembling. Mild dish detergent (Dawn 'Power Plus' is great for this) run though the slides and valves (remove pistons before washing) will wash out old oil and sludge. It might be a good idea to give your horn a bath at this time, although it is not absolutely necessary. Its precision applicator tip makes it especially easy to reach rotary valve bearings.ApplicationWhen trying Fat Cat Oil for the first time, clean off all old oil with soft cloth. Be assured that Fat Cat Oil will work extremely well in trumpets, baritones, euphoniums, French horns and tubas of all makes and ages. So much so that it OSHA considers Fat Cat Oil as non-toxic, non-carcinogenic, non flammable and non hazardous. Fat Cat's viscosity ('thinness or thickness') is similar to other 'fast' oils but works better because of its purity. Fat CatFat Cat Valve OilFat Cat Valve Oil is ultra-refined petroleum oil that chemical tests have shown to have fewer impurities than other popular valve oils.
