Posted 20 Apr 2021 I'm almost to the point of covering the wings and have a question about treating the aluminum spar. What is common practice - and what have you done with your plane? Thanks in advance for your comments. Share this post Link to post Share on other sites
Posted 3 Aug 2021 While you may not need anything, I would consider Alodine. A lot of the Vans RV guys treat their aluminum with it. 1 person likes this Share this post Link to post Share on other sites