Never heard of it. I kind of like the Castor smell. I got lucky with weather and time and got 4 flights in today on a SPAD Debonair. Wind 10 gusting to 18, 50 degrees and Sunny, field grass was wet. I feel lucky because I haven't flown since late November. Don't know when I'll see another opportunity like this. But I should keep the Avistar ready.
Oh, and I smell like Castor.