Are you using EZ Line?
I've just brought in a load of (much cheaper alternative) 0.50mm stretch thread in black as well as in white which is just as good - the Prym brand with will retail at £2.50 for a 200 mtrs reel. In fact it's the same stuff that arrived when I ordered some WnW's "branded thread" and was surprised at to what I received for my money! Both take paint well as, of course, CA for those who can't leave it alone.