RE: Article about Castor Oil in R/C Report
He is exagerating the obvious. Castor oils is about 80% ricinoleic acid.
Structural Formula Of Ricinoleic Acid
HOO-C-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH=CH-CH2-CHOH-CH2-CH2-CH2-CH2-CH2-CH3
As you can see it is actually a very long hydocarbon. It is a very very weak acid and does not attack metal. Most hydrocarbons and alcohols are slightly acidic.