I have recently launched an experimental trial to identify the best grade(s) of stainless steel for beadmaking mandrels and am hoping as many people as possible will join.
This is not a profit-making exercise - though I am "marketing" it through my Etsy shop and I hope to recover my costs eventually if enough people take part. I will make the results of the exercise available to anyone to who wants to see them or make use of them.
I am in the UK, so international shipping costs may be a problem but perhaps some of you may be interested in any case. Check it out here -
www.etsy.com/uk/listing/231654533 - and contact me if you want more info.