I chose a coloured frame to inject a more modern note into this Found Object collage. I matched the old paint on the blue keyhole to the frame so that the colours would harmonize with a room in the same tones. I made a pencil rubbing of an antique key as a soft background to contrast with the harder metals. www.allaboutdrawings.com  Pencil rubbing, or frottage, is a technique pioneered by early Expressionist artists. www.nationalgalleries.org, 3″ x 5″