Re: Spanish cedar sap
It's my understanding that denatured alcohol is ethanol with 10% methanol. The purpose of the methanol is to prevent its consumption. It's commonly used in the wood working community as a sanding aid because of its rapid evaporation and cleaning abilities. I have never used the isopropyl alcohol for cleaning sap, so I cannot comment if it works better or not. Because of their rapid evaporation, I do not believe there is any risk using either. The reason the denatured alcohol is used in woodworking is it does not open the grain like water does. Its also used in very small quantities in products like tooth paste.
Chas
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