The coating may discolor due to weather and sunlight. The best way to avoid such discoloration as much as possible is to treat the snuffers and covers from time to time with wax. Also, the wooden knob should be treated with wax in order to avoid the wood to dry out. If the cover has discolored, you could treat it with stove polish.
Water will collect on both the snuffers and covers as a consequence of rain. This water should be removed in order to avoid/slow down possible corrosion.
We strongly advise against placing any of our covers, the Snuffer 85, 100 & XL and the Cover 85 and 100 alike, on their sides on hard surfaces.