I'm surprised no-one has replied to this.
Originals had a wad over powder and a second wad in the form of a donut for the ball to rest in. The second wad was lubricated around the edge with a secretive it seems lube, probably of paraffin/Vaseline/beeswax mixture after the tallow fiasco in India. Of course, I'm just giving the basics here, as the firms that produced them all did it in a variety of ways. In extreme heat, I was always fearful of any lube contaminating the powder, but also fearful of leading. Firing without lube will cause a lot more fouling, but when it's only one shot from one or a pair of barrels at game, it really no longer matters, but I'd let the edge of the second wad soak a tiny amount in, but not so much that in the heat it will migrate downwards. Nobody benchrests all evening with an 8 anyway. I just lightly lube the donut wad if hunting in hot temperatures or a couple shots for fun. Mine is a 12, not an 8, but all the bore rifles using ball work on the same method. A ball does not have much lead around the equator, so it does not actually require a heavy amount of lube in the first place. Use a good hard lube if in above 100F climate. Soak the wad edges in the melted lube and set them aside to dry. You will get leading if using no lube, but it's sort of an experiment in how much you need the wad to soak up, plus what temperatures you will be in. In other words, if you're in the desert, don't bring the Crisco along.