Expired Polaroid Color Shift

Transform this photo to look like it was taken with heavily expired Polaroid 600 film. Apply the extreme color shifts characteristic of 20+ year expired instant film: heavy magenta or green color cast dominating the image, drastically reduced contrast, foggy shadows that never reach true black, and washed-out highlights. The image should have the classic Polaroid square format with the thick white bottom border. Add chemical migration stains and the organic, unpredictable developing patterns of expired chemistry: blotchy uneven development, color pooling, and areas where the image barely formed. Include the slight iridescent sheen of old Polaroid emulsion. Write a date or name in ballpoint pen on the white border. The overall look should be beautiful in its imperfection.