I think perhaps we use different heating techniques besides whether or not we like condiments on our bows. I heat slow, by keeping the gun a sufficient distance away, and always moving, heating all sides. I never leave it still, not for a second. Though my method may be slower, I heat long enough that I'm sure the heat has soaked through to the center of the stave, but never get the surface so hot that I can't hold it in my hand. In the end, I usually have no discoloration at all on the wood's surface. I have seen bows scorched pretty bad and suspect folks might leave the heat source sit close and/or unmoving. This may increase the likelihood of cracks opening as well, and may lead folks to believe they need oils to keep it from happening.