I have a 65 with reproduction knock off rims. The right front disc is leaking fluid at a very slow pace, so needs to be fixed. My problem is that I can not spin the knock off. I have used the lead hammer, put heat (not flame on it), sprayed it with a silicone spray, hit it with a bigger hammer and nothing is moving it. When I sprayed it, I saw rusty colored overspray dripping down.

Any additional ideas or suggestions would be greatly appreciated.