can anyone walk me through the steps of positioning my polarizing filters to red uce reflections on a glossy black painting i'm photographing? i assume i put the polarizing filters over the two lights first, and then one on the camera. but w hen i put them on the lights, how do i orient them? and do i look at the results of different orientations from behind the lights, or behind the camera? then, w hen i go to put a filter on the camera, do i orient it with the light-filters pr esent or absent? what is the right sequence for all this? and then, do i just ad d two stops of exposure to compensate for the filter on the lens, and take an in cident reading off the painting once the filters are in place over the lights? t hanks.