[Instrument Attic]

In his bench review of Yanagisawa baris, Stephen Howard recommends "nipping it in the bud" if the flux bleed happens early in the sax's life.

Yanagisawa 9xx series baritone saxophone review

A workbench review of Yanagisawa's 9xx series baritone saxophones

www.shwoodwind.co.uk

 

[Instrument Attic]

Fixing flux bleed is straightforward: remove the lacquer in the affected area, clean it thoroughly, polish, then spot lacquer the area. The adjacent joint must be fully cleaned which can include adding solder there since there's often a gap where the bleed is occurring.

This one certainly could be done spreading, but on such a new horn I wouldn't bet on it being stabilized yet.

Trombone and trumpet communities share this woe and it's common among other sax makers.