This is not an ideal solution, but what I did for the same parts on my 70 Cougar convertible. I ran into the same challenges and ended up 1) sanding them down, 2) filling in the pits with liquid metal, then sanding to a smooth finish, 3) spray painting with multiple coats of chrome paint (Krylon Premium / Original Chrome), and then 4) buffing the chrome paint which dulled it to a very similar color and finish to the original satin finish chrome. They are prone to scratching so you have to be more careful than with re-chromed parts, but they look great.