I have some phosphate crab nodules from the Isle of Sheppey that I've had for years. Haven't found a good way of prepping them yet. Tried various air tools (ME9300 and microjack) and air abrasive with limited success. Do any of you UK guys have any secrets you could share with me. Have one of the rarer spiney crabs that I would like to turn out good.
Thanks for any help you can provide