Funky Solution #2: Baby wipes. Yes! If the paint is still even slightly tacky (pretty likely, with oils), take a baby wipe and gently pull the paint over the adjoining bare canvas. As long as the areas are fairly small, there is no noticeable damage to the previous brushstrokes, and the bare areas are no longer glaring at you.
~~Baby wipes are a universal solution (a fact well-known by mothers everywhere)~~