Bushveld beat me to it, I was about to make the same comment on Boiled Linseed Oil not being the same.
A method I've used in the past which works very well is to heat the barrel(s) with boiling water until they'te almost too hot to handle, then rub on melted pure beesway, the heat of the barrels lets the wax flow into all the angles, seams and corners. Set aside the part to cool.
Harry
Does it matter how you heat the barrels? When you are applying the wax to the receiver, does the hot water have any impact of the wood? Or do you have to be very careful not to get the hot water on the wood?
Canvasback