Hi, I would be very grateful if someone could help me! I am new to using a barrel tumbler ( I have the cookson gold pro max starter kit which came with mixed shot). I am finding that the edges of my pieces are coming out with burrs and sharp edges on them. I am putting them in as nice smooth rounded edges and they are coming out looking sharp and horrible! I then have to file them round again. This is mainly happening on pieces that I am making using blank stamping discs. I have attached some photos of before and after going in the tumbler incase this doesn't make sense. Apologies for awful photos but I think they just about show what I mean.I have tried using barrelbrite and washing up liquid and its the same problem with both. I can't work out how to stop this happening, any help would be hugely appreciated...

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