if you are Formulation a Warming Oil without any water content the Warming effect of hot Flux will be reduced and it can lead to an interesting effect. When you apply the oil it does not warm up but as soon as you go under the shower or add water in another way the heat sensation kicks in.
I had several Hot Flux Formulations on my table in the last several years and one was an Oil Spray and it did not get any warming sensation at all with only oil.
The Suplayer told me that the Hot flux mechanism on the skin needs some water to be triggered. the water from sweating often is not enough so be aware of that phenomenon and try it yourself with an oil-based formulation first on the skin and adding water afterward to trigger the effect.