Galvanized is fine to weld with proper ventilation, good prep work and a respirator never hurts to have on. I can't count how many fence gates I've welded on and never got so much as a sniffle. All about being cautious with it.
Anyways back on topic, pics won't load on my phone but I'm curious what are you using for door latches?
I don't get lost, just temporarily misplaced
'12 JK-built and wrecked
'89 XJ-work in progress