Fatman, the Human Flying Saucer (comic)

Fatman, the Human Flying Saucer is a three issue comic book series, originally published by Lightning Comics from April 1967 through September 1967. It features the comical adventures of the titular Fatman, the superheroic alter-ego of Van Crawford, a wealthy hobbyist interested in orchids, who gains the ability to transform into a flying saucer after drinking a preparation gifted to him by a shapeshifting entity.

Reading

 * Digital copies of Fatman the Human Flying Saucer #1-3 on ComicBook+, https://comicbookplus.com/?cid=2064