Funny, Lee and all the others claim Bakers AA is degummed. I guess they don't know what they are talking about. They've only been using the stuff for 50 or 60 years and design engines. You can buy medicinal Castor oil and it's not degummed. I know, I had to drink the crap when they were checking me for butt cancer. Medicinal castor can not be used in model fuel because it will carbon up the engine in no time. It is NOT degummed.

As far as being corrosive??? I have been using Hobby Shack White Lightning fuel for 20 years. It is 100% castor oil lube. 10% nitro and the balance straight methanol. I have been using an old BOLT ON head Saito 45 since 1982. After 24 years I finally had to replace the bearings. Rust?? None. Any corrosion?? Nada. They finally just wore out.