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@Mikenetic
@coldharbour has way more building experience than me, but in my opinion the gouges aren't too much of a concern. The alloy will be pretty thick, and there's a substantial amount of weld
Typically brake bridges are mitred to match the profile of the stays, what that means is that it normally grips around the stay (like this).
It's pretty firmly wedged in. The other side looks fine, so even in the very worst case it's likely to twist, rather than break away.
The bubbling paint looks like water (or sweat, most likely) has got in under the cable adjuster mount. Might be worth giving that a poke with a sharp point to make sure it's solid under there. I've seen sweat corrode right though an alloy handlebar. Unlikely in this case, most likely it's surface oxidation on the tube debonding the paint, as Howard says.