You need thick clothing, strong gloves and eye protection! However, don't worry about the shape. They recover so fast you will hardly notice. I think you are right to tackle one at a time but although it's hard work, it's not as bad as it sounds: all that protective gear is just to stop them fighting back!
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I live in west central Scotland - not where that photo is...
many thanks for your comments and suggestions.
I'm now armed and ready...