Silver solder & braze are completely unaffected by hot bluing. Most all modern production sxss & o/us barrels are hot blued. There are of course exceptions.
Soft solder is definitely affected by the bluing solution, but its probably more affected by the heat that is applied during the process that starts to break down the joint.
If ribs are properly laid.....there should absolutely be no need for weep holes, etc. weep holes are a good sign of a low grade soldering job where the manufacturer was worried about production vs quality. Ive had to have a few ribs relaid over the years, the worst jobs were on my American guns.
