I have never used fish oil in a spray can so I wouldn't know how well that works, I usually buy a 4 liter container of it, lasts me years. . It is not the fact that mowers were stored under the house the problem comes with condensation even in a dry shed falling onto the upper surface of the thin chrome and then it starts rusting. Many old motorbikes suffer the same fate the upper surface of the chrome, mufflers,handelbars , bottom of the rims where the chrome is facing up all suffer this fate.
