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Angle grinders make quick work of through hull + seacock removal, BUT, you can easily overheat the surrounding FRG.
So, for 'recalcitrant' grinding (especially for TRUE bronze that has the absolute minimum of zinc component, zinc added for ease of 'machining'. Without zinc, bronze is a 'b!tch' even to 'grind') the hacksaw method combined with or in combination of the angle grinder method is a good way to remove and not 'overheat' the FRG.
The better and more expensive alloys of bronze have very little zinc, and a very hard to grind, cut, or machine. NiAl-Bronze is probably the 'hardest'; most of what you find on rec. boats is really a 'Red Brass' because its loaded with zinc to make it cheaper to machine, and is therefore easier to cut or grind - but you better have sufficient zinc anodes elsewhere because if you dont the zinc within the Red Brass (faux bronze) will become the 'anode'.
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