The real point of my post though was that using these sprays on wood instead of leather delivers a big difference that you will notice.
Most leathers will soak the compounds sub-surface which then don't allow them to work so efficiently while balsa (very porous as well) seems to float the compound on the surface if the compound is thick enough. I prefer to use a compound and leather that worked well together because when you find this combination you get the added benefit of the leather providing draw (drag) to the edge which pulls burrs which is one thing that balsa doesn't do, balsa can align and refine but provides no draw.