I will be using ACF 50 on my alloy wings and stainless fastenings as it says it has a insulating aspect. It is made by Lear jet and the pressures are greater on a Lear jet than a Morgan and they use similar metals.
Having taken my wings off, there is very little penetration into the beading from heated waxoil from a can that I had been using.
I have cleaned the alloy under the car and it is as good as new. So the underseal Morgan use works well. It is the inter action between stainless fastenings and the alloy panels that have caused the problems on my car.
It was different on my old 4/4's, that was just good old rust.
2007 +4 4seater


Titus

2007 +4 4 seater
2017 Mini Cooper
2007 VW Camper
1996 Honda TRX300
2012 Husqvarna 216