Lugnut: You are doing what i would love to do. I was going to check with my local Cal Lab to see if i could work something out with them in terms of inspecting vinyl and documenting the differences in cleaners. I would think that they would have some type of high powered microscope and the ability to record / document before & after photo's. I was interested in doing this myself, but having some type of third party perform the tasks seemed like a better idea. I might "fool myself" into obtaining the results that i wanted to see and this would act as some type of a "control" in the whole testing process. Sean
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