Description:Camera lubricating Jun 7, It did not help at once, but the day after the shutter worked flawless on all speeds. I would not know if this is recommended, or should one use a different lubricant. Could CRC do harm. The only spray lubricant that is verboten is WD or other similar ones with silicones. I just did the Compur- Rapid on a Karat 36 where the shutter was pretty gummed up. After several floodings with Zippo fluid, and a drying time of 2 days, it works and I did not lube it. Used a good bicycle grease for the helicals, though.