Rubbing alcohol, or isopropyl alcohol, typically is 70% alcohol and 30% water, and it also is available as 91% alcohol/9% water, which is why it doesn't burn. Denatured alcohol has no water in it, which is why it does burn. I use 91% rubbing alcohol as a wetting agent, in a spray bottle, for use in scenery-making because it evaporates fairly quickly vs. the water/detergent wetting method (which sometimes takes days). For track cleaning fluid on an RL LInes foam roller track cleaning car I use denatured alcohol. I've not used the 91% for stripping paint. I also use 91% alcohol to lower the freezing temperature of windshield washer fluid. Phil
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