I've been reading up on infrared photography recently. I understand that a textured backplate can result in the texture becoming part of the image due to the lack of anti-halation layer on the film. My SLR (Minolta XG-M) has a grid of tiny dimples (as opposed to bumps) on the backplate, but otherwise seems to meet the basic requirements for NIR photography. I'm wondering if it's possible to modify the backplate. Examining the camera, the backplate is spring mounted, and presses against a set of metal pads on the shutter housing when the camera is closed, so "skinning" the backplate with a thin, smooth, opaque material seems feasable, on the surface at least. It wouldn't alter the film plane, since the plate pinions the film against the shutter housing, and the spring mounting seems like it would easaly accommidate an extra 1/4mm of thickness. Any thoughts?