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A wide rubber band around the outside can help you get a grip. Also a thin rubber band on the threaded portion lets you screw it in place without it going in fully and sticking but also helps stop it from unwinding too (like would occur if you normally just don't screw it in fully).
Also I've found a tip for people using a SA100 or similar spectrum filter for imaging where its important but often difficult to get the spectrum horizontal on an imaging sensor. Using a small rubber band or O ring on the thread lets you screw it onto the imager and line up its reflections horizontally and the give in the rubber means it will compress enough for you to get the alignment and it will then hold its position when you slot it back into your focuser.
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