~~~ the threads mentioning some of the finds many years ago and their poor storage would be very educational, along with reading the health risks, but as I mention above, the posts by those in the industry and science teachers as Katie Smith and those who she has quoted, are must-read articles in order to know about breakdown of the plastics. Personally, I avoid most of those types of plaques that are discussed with the problems; not knowing what methods were used in trying to unwrap and make an othewise damaged plaque appear to look better as these things changed hands... The posts/articles will say it all... especially when reading the not-so-good methods of coating a plaque with nail polish or the lunettes with marine varnish and applying heat to unwrap a plaque.