Go over to the members projects & survivor pictures threads and look for UCUDANT's thread, 1972 340 4spd Cuda posts. Page 29 of that thread shows how he did his LCAs. I've seen them in person and they look great.
On my 70 Sport Satellite, I bead blasted them clean, then on the LCA I used RPM first, then got the actual cosmoline and dipped them as the factory . . . on the strut rods, I bead blasted them and then just used the RPM on them . . .