So I leave town for 7 days and when I came back somebody or something had defecated on the back rest. Probably a bird or possible an iguana. After cleaning up good with soap and water there was still red "stuff" left. Tried denatured alcohol, no cigar. Don't want to try real heavy stuff before I talk to experts and/or an upholstery shop. The red "stuff" is probably from red berries, which grows on a bush in my back yard. Mixed with stomach acids it seems to have permanently stained the plastic or whatever the upholstery is made from. Any idea for cleaning/bleaching/removal? Berrie Juice processed and decorating back rest for cockpit settees.