I've been asked to prototype some custom athletic footwear with a unique sole. The client's patent application depends on it. Where to begin?
Step one: remove the sole from generic store bought athletic shoes.
Maybe not surprisingly, rubber that stands up to daily wear on pavement also stands up to to most efforts to remove it intentionally.
So, what does the trick? I found that both the electric hand planer and the band saw work, but a bandsaw with a fresh, fine-toothed blade is much quicker. The electric planer on the other hand did well at evening out the cut surface, better readying the footwear for its new sole.
Look for step two in a minute.