Paul.
Moderator
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- 7,052
- Location
- Northampton. UK
Initially I would use a stainless rotary wire brush to clean the area both sides, then probably drill or countersink the hole to expose clean metal, a thin copper backing bar, (flattened copper pipe) clamped at the back then give it a go with the tig, it will either weld, or spit and explode.