The people in George Fisher told me waxing was easier. Do you disagree? My boots are nubuck (Meindl Meran GTX) they told me I could use either.
I have the Meran and they have only ever had wax.
Put the tin of wax out in the sun to warm and soften.
Apply with a rag (microfibre cloth) rub well in in a small circular motion generating a bit more heat.
Apply thickly on stitching and work well into the stitching.
Rub well in.
Wait half an hour and 'polish' vigourously with a cloth.
The 'nubuck' has disappeared and they just look/feel like normal soft, smooth leather.
They are the most comfortable slippers (oops - Boots) I have had.
Works for me.