I have a masonry wall that I'd like to hang a 2x6 on (6 side against the wall) so that I can use it as an anchor for a curtain rod. I would then like to stucco around it. I was wondering if it's okay for stucco to be in direct contact with lumber. The lumber will be prominent even after the stucco is applied as I don't plan to make them flush, so aesthetics is not an issue.
For a clean and neat appearance you might want to consider installing a "J" channel along the 2 x 6's bottom edge. This is a length of metal roughly shaped like the letter J in profile. This is used for a three layered stucco system. It covers the stucco's edges for a clean and straight appearance. Sold in 10 foot sections. It would also compensate for any movement between the two dissimilar materials (wood and cement) and prevent cracking.