I've had good luck with metering off of the palm of my hand (which doesn't change color with the seasons like the back of my hand) and adding one stop exposure. This has worked for me with color slide and color negative film. For B&W infrared, I usually do a sunny f/4 with the IR filter that I have, because when I shoot infrared, its usually a sunny day.
Me too. It consistently matches a reading off a gray card. It always gave me excellent results with transparency film, so long as I had access to the same light as the highlights.
The palm of the hand seldom will 'match a reading off a gray card'...it is
about +1EV compared to a gray card regardless of racial background. And in Jan 2012, in writing a post about palm metering on APUG, I had metered my own palm with a Minolta F 1degree spotmeter and found it to be +1.5EV brighter than the gray card! Doing it just now, I find the difference to be only +1.1EV -- so it does change, simply not as much as the back of the hand which tans...four months ago my wife will tell you I was very darkly tanned after vacationing at Lake Powell.
Back on the topic of which meter, I find a spotmeter allows me to assess the range of brightness in a scene and know how well or how poorly it fits within the range of the type of film I am shooting, it allows me to also precisely 'place' certain tones within the scene where I want them to fall. An incident meter does neither of those things, it only tells me the center of the exposure and I have to HOPE that all the tones in the scene will fit properly...a higher probability of happening with B&W, a lower probability of happening with color transparency film.
I urge all folks to 'calibrate' their own palm against a known 18% card to know
precisely the difference in brightness. Using the palm --
not using the back of hand -- has been known for decades as the more reliable technique.