Mick,

I've never used any of the products you've listed, but I've had good results with Hedgehog Leatherworks Sheath Condition which is primarily a bees wax base. I've used it on sheaths and leather handles and it works very well. The Hedgehog folks recommend using a cloth or paper to apply it, but I prefer to use my fingers to work/knead the wax into the leather.

I use it sparingly, and Danny is correct...a little of whatever you use goes a long way.

I have found it to be of great benefit for leather which has dried or otherwise is in need of some TLC (it rejuvenated the leather handle of a SOG Scuba/Demo knife which had been VERY dry). I have not experienced any appreciable (perhaps slight) darkening of the leather.

Hope this helps.

Bob