I will add my thoughts.
I stripped down my entire rear end, new everything apart from subframe, but all the parts I sent off for blasting, zinc priming, then finished in off-shore grade black 2pack paint. (even the new bits as the standard finish is garbage)
I then used 3M white cavity wax inside the subframe and upper arms, which worked wonderfully, and also then used Dynax-UB to coat all the steel brake lines and fittings and bolt heads under the car to prevent anything corroding.
I cannot recommend the dynax UB enough, it is great stuff. A huge can, and if you multi layer it, even if thick it dries quite clear over time so it does not really affect the look of the car.
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