I have stumbled across an alternative for covering rising dough which seems to be almost like a "teflon" towel. I purchased a 100% microfiber cloth napkin at "Bed, Bath, and Beyond" and it is incredible so far. Dough, even wet doughs (have not tried ciabatta yet) don't stick at all. I covered a sourdough raisin bread overnight in a brotform lined with this and only a minimal amount of bread flour. In the morning, the loaf turned out much more easily than even with my linen-lined bannetons.

The material is not like the fuzzy microfiber cloths but is woven like a fine linen napkin. For anyone who wishes to try one out, this is the link:

http://www.bedbathandbeyond.com/product.asp?order_num=-1&SKU=13472092&RN=63&KSKU=106081

They also make tablecloths in this material which could be cut into custom sizes.