Hi, im really new to soldering and I have been trying to fix some ds game cartridges. A lot of the vias (I think that’s what they’re called, the small holes) are rusted, and I saw on Tronix that he uses a wiring pencil tool to connect the path for the rusted via. Any idea on what the wiring pencil is called? Not sure about the tool name, as I already searched amazon. Also any solutions to fixing up the rusted vias to make a game cartridge working again would help, thanks!
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Use this word you can find
Fiberglass Brass Pen Rust Removal Brush Pen