Thanks Cyber,
I'll have a look at glass burnishers. Does it glaze the leather, though? i.e. make is glossy?
I bought 'standard' grade from W&C, which was their most expensive on their price list so I presumed it was their highest grade despite the name. Their 'special' grade was cheaper, from memory.
If I'm not doing any tooling, would anyone advise to treat the leather before working with it? I ask because another problem that I'm having is that during cutting, gluing and stitching, the leather seems to absorb every bit of dirt that gets in contact with it, so by the time I've finished all the hard work, it's covered in specks of dirt that are hard to clean off.