Hi, I've been experimenting with castor oil, here's somethings I've tried. 1. Soak the castor oil on a piece of paper towel and stepping on it. 2. Applying some castor oil on a piece of paper towel and wipe it over the surface of the shoe. 3. Soak the shoe with castor oil. and letting it dry. In cases: 1. Seems that I have to brush vigorously before it can be of use, lasts about 20-30 mins. 2. Immediately useable, lasts about 2-3 songs. 3. Must wait for the shoe to dry in a day or two, but the shoe remains kinda nice and sticky for a couple of days. How do REAL competitors usually apply their castor oil?