Solvent to dissolve shoe polish release agent?

[Fotheringill]

OR - What do the shoeshine guys daub onto a shoe to get rid of the old polish before applying new? That absolutely has to work. It is what it was designed for.

[RustyShackle]

OR - What do the shoeshine guys daub onto a shoe to get rid of the old polish before applying new? That absolutely has to work. It is what it was designed for.

Heat: how or what device you choose doesn’t much matter, Hell you could steam/boil it on the stovetop if you wanted.

[Nor Cal Mikie]

Brake Parts Cleaner on a tooth brush will get it out of tight spots. I have been known to polish the release agent (shoe polish) and leave it as a protectant.

[tobnpr]

Same degreaser that you (should have) used before applying the release agent (sounds counter-intuitive, but surfaces should be de-greased before, well, greasing them...)

Brake cleaner, acetone, TCE- all will remove it.

[mattri]

A little mineral spirits, a bronze brush and a wash in scalding hot water- clean as a whistle!

Thanks to all for the great replies.