In a word: "JASCO"
That's what I used on my chrome Limongi frame. Works perfectly. And quick. Don't get it on your skin. (Off-topic note: I used JASCO to remove the paint from a Bianchi Pista Concept frame prior to giving it a brushed finish. You know how that frame looks almost like fillet brazing? Of course it's not, not on aluminum, it's Bondo. JASCO removed that too. Good thing. I like the naked welds way better anyway.)
Mark Fulton
Summer's back in
Redwood City
California
USA