I cut the elephants again from some old 12mm ply, and I sprayed them with some unknown oil that was left after my mother died. I think it came from Betterware or someplace like that she was always buying from. It gave a sort of antique finish to the edges, which unfortunately doesn't seem to show on a photo, but looks nice - to me anyway. But the best part about it was, I didn't break any blades! I'm now sure Mark was right and I had been using too much pressure on the blade clamps. I suspect I might still have some problems with smaller size blades, but a #5 seems about right for me now, so I think I will stay with that size as much as possible.
Martin, still learning.