Hi Freia, welcome to Wire Geeks =) I can't say I have tried the brand you are speaking of, I went straight to copper and Sterling . Is it Sterling with a tarnish resistant coating? I have heard of sterling with this coating on it. I know that you cannot tumble it with this coating .That is enough to turn me off.
I mean if you are going to invest in Sterling wire, you might as well go all the way and tumble your jewelry. I use 930 Argentium Silver, it is tarnish resistant and cost not to much more than reg. Sterling.You can tumble it and it shines beautifully.
Nothing is really non tarnish. It will tarnish eventually, at least Sterling and Argentium can be easily polished back to it's original glory without a flaky residue.
Doesn’t sound like a good wire you are using even if it's just silver plated, flaky is not good for wire wrapping. That wire needs to be able to take some abuse ;)
I would suggest you switch.
Check out www.riogrande.com, they have a good selection.
Here are some Wire Geek threads u might find interesting;
http://www.etsy.com/teams/10722/wire-geeks/discuss/9120364/page/1http://www.etsy.com/teams/10722/wire-geeks/discuss/9089420/