Nothing cuts through petroleum grease like a petroleum product. True. But given the safety issues, and given that for most of us its hard to properly dispose of them, I really would rather use a little effort and go with Simple Green or a citrus cleaner of some sort.
And also do not forget that any rags you use with a petroleum product are a potential danger by spontaneous combustion unless properly handled. It really can happen, and the factors that lead to it are not as hard to come by as some people seem to think. Please be careful.
j
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