[lstodd]

From the article and their paper it is not clear how they intend to scrape the salt deposits from the untreated part of their panels.

If you ever tried to clean seasalt from your car or boat for example, it's not a trivial process and is best done by washing it away, which is counterproductive in this case. Mechanical scraping would likely either damage the panel or not clean it enough besides requiring moving parts which is costly.

So it remains to be seen if this is useful at large scale.