Michele, I agree with you, hardware store solvent is bad stuff. However, Sunnyside Odorless Paint Thinner is not typical hardware store quality. It is not stocked by hardware stores like the cheaper stuff but must be special ordered. Both Gamsol and Sunnyside have the same low toxicity rating on their MSDS: health-1 and flammiblity-2. Both also have the same recommended exposure limits of 300 ppm. The flash points are different: Gamsol is at 145 and Sunnyside is 120. But it is used at Shanks
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