Re: Restoring WW2 Junction Box - confused?
I don't think car body filler will fall out, after all it is designed to withstand vibration which you won't be subjecting it to. If you are worried that your pitting isn't deep enough for a good key then just drill holes in the pitted area which will let you form a "blob" on the inside which will hold on better. I did a large repair on a Landrover wing like that which vibrates and flexes in use. Nothing fell out.
Gordon
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