Summary: I acquired an older fuji frame with a broken driveside dropout. Looks like the poor thing just sort of started rusting and the dude who owned it (a buddy of mine who goes 250 pounds, considers 80 rpm to be "spinning" and is strong and fast as hell) finished it off mashing on the way to work one day.
For practice, I decided to fix it by retrofitting a set of stainless track drops.
So, the question is: How the hell do I get the inside of the seat and chainstays down to bare metal where they meet the new track drops? Or, do I even need to?
I've filed the tangs that extend over the plate drops so I'm good there, but there's still some residual brass (at least I assume it's brass) inside the stays that I can't reach with a file but that will surely get filled with silver since I want as much contact area as possible.
Can I just fill the silver over the residual bronze and get a strong join or do I need to go dropout-silver-bare metal at all costs?
Hopefully that explanation makes sense.
I'd love to give the frame back, but only if I'm certain the drops are gonna hold and from what I'm seeing, I need to get as much surface area as possible joined with silver to be certain.
Another option I considered was to switch to mild steel drops instead and use brass, but I think the same "how clean is clean?" question would still apply.
Any advise is much appreciated, and yes, I'm a novice with two whole frames under my belt so this is uncharted territory. :-)