New Mercian Vigorelli Track

I've suffered a sandy frame flange (around the lug area) too, it's infuriating. Thought about a vacuum cleaner, ended up selling the frame.

But in a fork blade, with no drilling - what am I do to? drill the blade to get the loose braze out? I've even thought about magnetising the fork blade so at least the braze stays static...
they will have a small hole about a third up on the inside, get covered very easy with resprays though ;)