I've been using a 0.5 mm mechanical pencil for CA application. Once I'm done, I just break away the used portion of the lead and extend a new length of it. Very quick, economical, and there is nothing to wipe.
Also, search for "microbrush" on eBay. Those tiny applicators have numerous uses in modeling. You can find them for about $2.00-2.50 per a pack of 100, incl. shipping. I think the purple ones are the thinnest. Here is an example:
http://www.ebay.com/itm/100PCS-Disposable-Eyelash-Extension-Micro-Brush-Applicators-Mascara-Wands-Tools-/272266528193
Hobby stores sell those, too, but they charge considerably more.