My buddy works in a Boat Dealership and I asked him what he thought, His answer was Oh! We get that stuff all the time on our boats upholstery, He says it is a mold, the cloudy white comes off easy but when mixed with some black spots it can leave permanent marking. There are thousands of molds so who knows what causes it. No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1206 - Release Date: 1/1/2008 12:09 PM