Joined: Jan 2008
Posts: 23,642
Likes: 1,106
From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
With rust like this one, I use a dremel carefully to expose the rust, and either spot treat, or go the full OA bath route. Assuming rust is just in this area, I would spot treat.