I went and visited a friend who is building a Concouse HX Sandman. The level of detail he is going to is boardering on some sort of medical disorder. reproduction tailshaft paint markings, correct assembky stickers and his collection of NOS parts must be worth many $1000's.
Anyway while looking over his shell I was amazed how good it was for rust. After further inspection I saw the plugs, his car is one with the rust proof option.
There are heaps of these little plugs all over the place where it was drilled and I think by the look of it some sort of cavity wax was sprayed in.
Looks like a brown hard thick liquid which has hardened over the years
I think when mine gets hove im going to do a bit of this myself, I wont have to drill the doors, dog legs and inside the back as the panels are already off but har places like the tailgate upeer and lover I will drill a few of these holes. I will pump some rust converter and let it dry for a few weeks follwed up with cavity wax. I have located 12mm white plugs like factory to cover the holes.
Should ensure she looks good for years to come
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